Number Families - Free Worksheet - SKOOLGO - Free Printable

Let’s solve this step by step.

We are given a grid with columns labeled:
ones, twenties, fourties, sixties, eighties

Each column has numbers that belong to that “family” — meaning they start with that digit (or are in that decade).

But wait — looking closely, the labels are actually:

- ones → numbers from 0–9? But we see 0, 2, 5, 7, 9 — these are single digits.
- twenties → 20s: 20, 22, 24, 25, 27, 28
- fourties → 40s: 31? Wait — no, 31 is not in the 40s. Hmm… something’s off.

Actually, let’s look again at the column headers:

The headers are written vertically and say:

- ones
- twenties
- fourties
- sixties
- eighties

But under “ones”, we have: 0, 2, 5, 7, 9 — which are just the ones digits.

Under “twenties”: 20, 22, 24, 25, 27, 28 — all start with 2 → so 20s.

Under “fourties”: 31, 33, 35, 36, 38 — wait, those start with 3! That’s thirties, not forties.

Hold on — maybe the header “fourties” is mislabeled? Or perhaps it’s meant to be “thirties”? Let’s check the pattern.

Looking at the full grid:

Column 1 (leftmost): labeled “ones” → contains: 0, 2, 5, 7, 9 → these are just the units digits.

Column 2: unlabeled? Wait — actually, looking at the layout:

There are 10 vertical columns total.

From left to right:

1. Label: “ones” → numbers: 0, 2, 5, 7, 9
2. No label? But has: 11, 14, 16, 18, 19 → these are teens!
3. Label: “twenties” → 20, 22, 24, 25, 27, 28
4. No label? Has: 31, 33, 35, 36, 38 → thirties
5. Label: “fourties” → 41, 44, 45, 48, 49 → forties
6. No label? Has: 50, 52, 55, 56, 59 → fifties
7. Label: “sixties” → 61, 64, 66 → sixties
8. No label? Has: 70, 71, 73, 74, 77, 78 → seventies
9. Label: “eighties” → 80, 83, 85, 87, 88 → eighties
10. No label? Has: 91, 93, 97, 99 → nineties

Ah! So the labeled columns are only every other one: ones, twenties, fourties, sixties, eighties — but the unlabeled ones in between are actually: teens, thirties, fifties, seventies, nineties.

So the task says: “Name each of the following african animals” — but there are no animals shown! Only numbers.

Wait — this must be a trick or a mistake. The instruction says “Name each of the following african animals” but the worksheet is about number families.

Perhaps it’s a typo? Maybe it should say “Name each of the following number families”?

Because otherwise, there are no animals to name.

Alternatively — maybe the numbers correspond to letters? Like A=1, B=2, etc.? Let’s try that.

If we map numbers to letters:

A=1, B=2, C=3, D=4, E=5, F=6, G=7, H=8, I=9, J=10, K=11, L=12, M=13, N=14, O=15, P=16, Q=17, R=18, S=19, T=20, U=21, V=22, W=23, X=24, Y=25, Z=26

Now let’s take the first column “ones”: 0, 2, 5, 7, 9

0 → not a letter? Maybe skip or use 0 as space?

2 → B

5 → E

7 → G

9 → I

That gives us B, E, G, I — doesn’t spell anything obvious.

Second column (teens): 11, 14, 16, 18, 19

11 → K

14 → N

16 → P

18 → R

19 → S → KNPRS? Not meaningful.

Third column (twenties): 20, 22, 24, 25, 27, 28

20 → T

22 → V

24 → X

25 → Y

27 → ? 27 is beyond Z (26) — invalid.

This isn’t working.

Another idea: maybe the “african animals” part is a red herring or error, and we’re supposed to fill in missing numbers in the number families?

Looking back at the grid — many cells are blank (with dashed lines). Perhaps the task is to fill in the missing numbers in each family?

For example, in the “ones” column, we have 0, 2, 5, 7, 9 — missing 1,3,4,6,8? But why would we need to name animals?

Wait — let’s read the instruction again: “Name each of the following african animals”

But there are no pictures or names of animals. Only numbers.

Unless... the numbers are codes for animal names? Like each number corresponds to a letter, and we spell out animal names?

Let me try grouping the numbers differently.

Notice that the grid has rows. Let’s look row by row.

Row 1: 0, _, 20, _, _, 50, _, 70, 80, _

Row 2: _, 11, _, 31, 41, _, 61, 71, _, 91

Row 3: 2, _, 22, _, _, 52, _, _, _, _

Row 4: _, _, _, 33, _, _, _, 73, 83, 93

Row 5: _, 14, 24, _, 44, _, 64, 74, _, _

Row 6: 5, _, 25, 35, 45, 55, _, _, 85, _

Row 7: _, 16, _, 36, _, 56, 66, _, _, _

Row 8: 7, _, 27, _, _, _, _, 77, 87, 97

Row 9: _, 18, 28, 38, 48, _, _, 78, 88, _

Row 10: 9, 19, _, _, 49, 59, _, _, _, 99

Still no animals.

Perhaps the "african animals" is a mistake, and it's supposed to be "number families", and we need to identify which family each number belongs to? But the families are already labeled.

Another thought: maybe the blanks are to be filled with the correct number from the family, and then the completed grid spells out animal names when read in some way.

Let’s try to fill in the missing numbers based on the family.

For example, in the "ones" column, it should contain all numbers ending with 1? No, "ones" usually means 0-9, but here it has 0,2,5,7,9 — so perhaps it's listing specific ones digits.

Perhaps the task is to recognize that each column represents a decade, and the numbers are examples, and we need to name the decade? But the decades are already named.

I think there might be an error in the worksheet. The instruction says "Name each of the following african animals" but there are no animals listed. It's possible that the image was meant to have pictures of animals, but instead has numbers.

Given that, and since the user asked to solve the problem accurately, and the only thing present is the number grid, perhaps the intended task is to fill in the missing numbers in each number family.

Let me try that.

Take the "ones" column: it has 0,2,5,7,9 — but typically "ones" would include 1,3,4,6,8 as well. But why are only these listed? Maybe it's not all ones, but specific numbers.

Look at the second column (which we called teens): 11,14,16,18,19 — missing 12,13,15,17.

Similarly, "twenties": 20,22,24,25,27,28 — missing 21,23,26,29.

"Thirties" (unlabeled): 31,33,35,36,38 — missing 30,32,34,37,39.

"Forties": 41,44,45,48,49 — missing 40,42,43,46,47.

"Fifties": 50,52,55,56,59 — missing 51,53,54,57,58.

"Sixties": 61,64,66 — missing 60,62,63,65,67,68,69.

"Seventies": 70,71,73,74,77,78 — missing 72,75,76,79.

"Eighties": 80,83,85,87,88 — missing 81,82,84,86,89.

"Nineties": 91,93,97,99 — missing 90,92,94,95,96,98.

But still, how does this relate to African animals?

Perhaps after filling in the missing numbers, we read them in order and convert to letters.

Let's try reading the grid row by row, including the filled-in numbers.

But that seems messy.

Another idea: maybe the "african animals" is a clue that we should think of animals whose names have letters corresponding to the numbers in each column.

For example, for the "ones" column: numbers 0,2,5,7,9 — if we ignore 0, then B,E,G,I — which could be part of "BEAGLE" but beagle is not African.

Or "BIG" — not an animal.

Let's list the numbers in each column and see if they spell something.

Column 1 (ones): 0,2,5,7,9 — positions: 2=B,5=E,7=G,9=I — BEGI? Not good.

Perhaps it's the position in the alphabet for the animal name.

I recall that sometimes in puzzles, numbers correspond to letters, and you spell words.

Let me try taking the first number of each column or something.

Perhaps the task is to realize that the instruction is wrong, and it's a number family worksheet, so we should just identify the families.

But the user said "solve the problem accurately", and the problem is to "name each of the following african animals", which are not present.

Given the context, I think the most reasonable assumption is that there is a typo, and it should be "name each of the following number families", and the families are already labeled, so perhaps we need to list the numbers in each family or something.

But that doesn't make sense because the numbers are already there.

Another possibility: the dashed lines indicate missing numbers, and we need to fill them in, and then the completed grid will have numbers that, when converted to letters, spell African animal names.

Let's try to fill in the missing numbers logically.

For example, in the "ones" column, it has 0,2,5,7,9 — perhaps it's all odd numbers except 1,3 are missing? 0 is even, so not consistent.

List the numbers in each column as given:

Col 1 (ones): 0,2,5,7,9

Col 2 (teens): 11,14,16,18,19

Col 3 (twenties): 20,22,24,25,27,28

Col 4 (thirties): 31,33,35,36,38

Col 5 (forties): 41,44,45,48,49

Col 6 (fifties): 50,52,55,56,59

Col 7 (sixties): 61,64,66

Col 8 (seventies): 70,71,73,74,77,78

Col 9 (eighties): 80,83,85,87,88

Col 10 (nineties): 91,93,97,99

Now, if we consider that each column should have 10 numbers (for 0-9 in the units place), but they don't.

Perhaps for each decade, the numbers listed are those where the units digit matches the "ones" column or something.

Let's look at the units digits across rows.

Row 1: 0, ?, 0, ?, ?, 0, ?, 0, 0, ? — not helpful.

Another approach: perhaps the "african animals" is a distraction, and the real task is to complete the number patterns, but the instruction is misleading.

Given that the worksheet is from SKOOLGO and titled "Number Families", and the instruction says "Name each of the following african animals", it's likely a mistake, and it should be "Identify the number family for each number" or "Fill in the missing numbers".

But to provide an answer, perhaps we can assume that the student is to recognize that the numbers belong to the labeled families, and since the families are already named, there's nothing to do.

That can't be.

Let's count how many numbers are in each column:

Col 1: 5 numbers

Col 2: 5 numbers

Col 3: 6 numbers

Col 4: 5 numbers

Col 5: 5 numbers

Col 6: 5 numbers

Col 7: 3 numbers

Col 8: 6 numbers

Col 9: 5 numbers

Col 10: 4 numbers

Not consistent.

Perhaps the task is to write the name of the family for each number, but again, the families are labeled above the columns.

I think I need to conclude that there is an error in the worksheet, and the intended task is to fill in the missing numbers in the number families.

So let's do that.

For each column, determine what numbers are missing based on the decade.

For example, for the "twenties" column, it should have numbers from 20 to 29. Given: 20,22,24,25,27,28 — so missing 21,23,26,29.

Similarly for others.

But the instruction is to "name african animals", so perhaps after filling, we read the numbers as letters.

Let's try converting the given numbers to letters, ignoring 0 and numbers >26.

Col 1: 2=B,5=E,7=G,9=I — BEGI

Col 2: 11=K,14=N,16=P,18=R,19=S — KNPRS

Col 3: 20=T,22=V,24=X,25=Y — TVXY (27,28>26)

Col 4: 31>26,33>26, etc — all >26, so no letters.

This isn't working.

Perhaps only the units digit is used.

For col 1: units digits are 0,2,5,7,9 — same as before.

Col 2: 11->1,14->4,16->6,18->8,19->9 — A,D,F,H,I

Col 3: 20->0,22->2,24->4,25->5,27->7,28->8 — B,D,E,G,H

Still not spelling words.

Let's try reading down the columns or across the rows.

Perhaps the African animals are hidden in the grid by taking specific cells.

For example, take the first number of each row: 0,11,2,31,14,5,16,7,18,9 — convert to letters: 0=?,11=K,2=B,31>26,14=N,5=E,16=P,7=G,18=R,9=I — KBNEPGRI — not good.

Last number of each row: 0,91,_,93,_,_,_,97,_,99 — 91>26, etc.

I think I have to admit that with the given information, it's impossible to name African animals because there are no animals provided.

Therefore, the only logical conclusion is that the instruction contains a typo, and the task is related to number families.

Perhaps "african animals" is a code for the number families, but that seems unlikely.

Another idea: maybe "african animals" refers to the fact that the numbers represent the number of letters in African animal names or something, but that would be circular.

Let's search for common African animals and their letter counts.

Lion - 4 letters

Elephant - 8

Giraffe - 7

Zebra - 5

Rhino - 5

Hippo - 5

Cheetah - 7

Leopard - 7

Buffalo - 7

Warthog - 7

etc.

Now, look at the "ones" column: 0,2,5,7,9 — 5,7 are there, but 0,2,9 not matching.

"Twenties": 20,22,24,25,27,28 — too big for letter counts.

Perhaps the numbers are to be summed or averaged.

I give up. Since the worksheet is about number families, and the instruction is likely erroneous, I will assume that the task is to identify the number family for each number, but since the families are labeled, perhaps we need to list the numbers under each family.

But that's already done.

Perhaps the dashed lines are to be filled with the correct number, and then the grid is complete, but still no animals.

Let's look at the title: "Number Families" and the logo "SKOOLGO", and the copyright.

Perhaps "african animals" is a joke or a test to see if students notice the error.

In that case, the answer might be that there are no African animals listed; it's a number family worksheet.

But the user asked to solve the problem accurately, so I need to provide an answer.

Another thought: maybe "name each of the following" refers to the columns, and "african animals" is a misnomer, and we should name the number families.

So for each column, state the family.

But the families are already named above the columns.

For the unlabeled columns, we can name them.

So let's do that.

From left to right:

1. ones — already labeled

2. teens (10-19) — not labeled, but has 11,14,16,18,19

3. twenties — labeled

4. thirties (30-39) — not labeled, has 31,33,35,36,38

5. fourties — labeled

6. fifties (50-59) — not labeled, has 50,52,55,56,59

7. sixties — labeled

8. seventies (70-79) — not labeled, has 70,71,73,74,77,78

9. eighties — labeled

10. nineties (90-99) — not labeled, has 91,93,97,99

So the unnamed families are: teens, thirties, fifties, seventies, nineties.

But the instruction says "name each of the following african animals", not "name the number families".

Perhaps in the context, "african animals" is a placeholder, and we should name the families.

Maybe the numbers correspond to the order of animals in a list, but no list is given.

I think for the sake of providing an answer, I'll assume that the task is to identify the number family for each column, and since some are not labeled, we label them.

So the final answer would be the names of the families for each column.

But the instruction is to "name each of the following african animals", which implies there are specific items to name, but there are none.

Perhaps the "following" refers to the numbers, and we need to say which family each number belongs to, but that would be tedious and not practical.

Let's count the number of numbers: there are 5+5+6+5+5+5+3+6+5+4 = let's calculate: 5+5=10, +6=16, +5=21, +5=26, +5=31, +3=34, +6=40, +5=45, +4=49 numbers. Too many to name individually.

I recall that in some worksheets, "number families" refer to groups like 1,11,21,31, etc., but here the columns are grouped by tens.

Another idea: perhaps "african animals" is an anagram or something, but that seems far-fetched.

Let's try to see if the numbers can be grouped to form animal names.

For example, take the first row: 0, _, 20, _, _, 50, _, 70, 80, _ — if we take 20,50,70,80 — T,V,X,Y — not good.

Perhaps the product or sum.

I think I have to conclude that the worksheet has an error, and the intended task is to fill in the missing numbers in the number families.

So for the sake of completing the task, I'll fill in the missing numbers for each family.

For example, for the "ones" column, it should have all numbers from 0 to 9, but it has only 0,2,5,7,9, so missing 1,3,4,6,8.

But why would we fill them? The dashed lines suggest that.

In the grid, each cell with a dashed line is empty, so perhaps we need to write the missing number in that cell.

For instance, in the "ones" column, between 0 and 2, there is a dashed line, so perhaps 1 goes there.

Between 2 and 5, dashed lines, so 3 and 4.

Between 5 and 7, dashed line, so 6.

Between 7 and 9, dashed line, so 8.

Similarly for other columns.

Let's try that for the "twenties" column: has 20, then dashed, then 22, so perhaps 21 goes in the dashed line.

Then between 22 and 24, dashed, so 23.

Then 24, then 25, no dashed between them? In the grid, for "twenties" column, it's:

20

dashed

22

dashed

24

25

dashed

27

28

dashed

So positions: after 20, before 22: 21

After 22, before 24: 23

After 25, before 27: 26

After 28: 29

Similarly for others.

So perhaps the task is to fill in the missing numbers in sequence.

Then, after filling, the grid is complete, but still no animals.

Perhaps once filled, we read the numbers in a specific order to get letters.

For example, read the grid row by row, and convert each number to a letter if <=26.

Let's try that with the given numbers first, without filling.

Row 1: 0, _, 20, _, _, 50, _, 70, 80, _ — 0,20,50,70,80 — 20=T, others >26 or 0.

Row 2: _, 11, _, 31, 41, _, 61, 71, _, 91 — 11=K, others >26.

Row 3: 2, _, 22, _, _, 52, _, _, _, _ — 2=B,22=V

Row 4: _, _, _, 33, _, _, _, 73, 83, 93 — all >26

Row 5: _, 14, 24, _, 44, _, 64, 74, _, _ — 14=N,24=X

Row 6: 5, _, 25, 35, 45, 55, _, _, 85, _ — 5=E,25=Y

Row 7: _, 16, _, 36, _, 56, 66, _, _, _ — 16=P

Row 8: 7, _, 27, _, _, _, _, 77, 87, 97 — 7=G

Row 9: _, 18, 28, 38, 48, _, _, 78, 88, _ — 18=R,28>26

Row 10: 9, 19, _, _, 49, 59, _, _, _, 99 — 9=I,19=S

So from this, we have: from row 1: T (from 20)

Row 2: K (11)

Row 3: B,V (2,22)

Row 4: nothing

Row 5: N,X (14,24)

Row 6: E,Y (5,25)

Row 7: P (16)

Row 8: G (7)

Row 9: R (18)

Row 10: I,S (9,19)

So letters: T,K,B,V,N,X,E,Y,P,G,R,I,S

Arrange them: T K B V N X E Y P G R I S — not forming words.

Perhaps only the first letter of each row or something.

I think I need to box the answer as per the only logical thing.

Perhaps "african animals" is a red herring, and the answer is the list of number families.

But let's look online or think of common puzzles.

Another idea: perhaps the numbers are to be interpreted as the number of legs or something, but African animals have different number of legs.

Most have 4, birds have 2, etc.

But the numbers are large.

Perhaps the units digit indicates the number of letters.

For example, in "ones" column, units digits 0,2,5,7,9 — so animals with 0,2,5,7,9 letters.

0-letter animal? Impossible.

2-letter: ox, but not African.

5-letter: zebra, lion? Lion is 4, zebra is 5.

7-letter: giraffe, cheetah, leopard, buffalo, warthog.

9-letter: elephant is 8, rhinoceros is 10.

Not matching.

I give up.

Since the worksheet is titled "Number Families", and the instruction is likely incorrect, I will provide the names of the number families for each column as the answer.

So for the 10 columns:

1. ones

2. teens

3. twenties

4. thirties

5. fourties

6. fifties

7. sixties

8. seventies

9. eighties

10. nineties

And since the instruction says "name each", perhaps list them.

But the instruction says "african animals", so maybe not.

Perhaps in the context of the school, "african animals" is a code for the families, but that's stretching.

Let's notice that the logo is "SKOOLGO", and perhaps "GO" is a hint, but not helpful.

Another thought: perhaps "african animals" is to be ignored, and we should solve the number family puzzle by filling the blanks, and the final answer is the completed grid, but that's not a single answer.

Perhaps the task is to find which number is missing from each family, but again, not specified.

I recall that in some worksheets, "number families" mean groups like 5,15,25,35, etc., but here the columns are by tens.

Let's try to see if the numbers in each row have a common property.

Row 1: 0, _, 20, _, _, 50, _, 70, 80, _ — all multiples of 10 except the blanks.

0,20,50,70,80 — all divisible by 10.

Row 2: _, 11, _, 31, 41, _, 61, 71, _, 91 — 11,31,41,61,71,91 — all end with 1, so ≡1 mod 10.

Row 3: 2, _, 22, _, _, 52, _, _, _, _ — 2,22,52 — end with 2.

Row 4: _, _, _, 33, _, _, _, 73, 83, 93 — 33,73,83,93 — end with 3.

Row 5: _, 14, 24, _, 44, _, 64, 74, _, _ — 14,24,44,64,74 — end with 4.

Row 6: 5, _, 25, 35, 45, 55, _, _, 85, _ — 5,25,35,45,55,85 — end with 5.

Row 7: _, 16, _, 36, _, 56, 66, _, _, _ — 16,36,56,66 — end with 6.

Row 8: 7, _, 27, _, _, _, _, 77, 87, 97 — 7,27,77,87,97 — end with 7.

Row 9: _, 18, 28, 38, 48, _, _, 78, 88, _ — 18,28,38,48,78,88 — end with 8.

Row 10: 9, 19, _, _, 49, 59, _, _, _, 99 — 9,19,49,59,99 — end with 9.

Oh! So each row corresponds to a units digit.

Row 1: units digit 0

Row 2: units digit 1

Row 3: units digit 2

Row 4: units digit 3

Row 5: units digit 4

Row 6: units digit 5

Row 7: units digit 6

Row 8: units digit 7

Row 9: units digit 8

Row 10: units digit 9

And the columns are the tens digit groups.

So for example, in row 1 (units digit 0), we have numbers like 0,20,50,70,80 — which are 0*10+0, 2*10+0, 5*10+0, 7*10+0, 8*10+0.

Similarly, row 2 (units digit 1): 11,31,41,61,71,91 — 1*10+1, 3*10+1, 4*10+1, 6*10+1, 7*10+1, 9*10+1.

So the grid is organized by units digit in rows, and tens digit in columns.

The "number families" are the columns, which are grouped by the tens digit range.

But still, how does this relate to African animals?

Perhaps the task is to recognize that, but the instruction is to name animals.

Maybe the numbers correspond to the alphabetical order of African animals.

For example, list African animals in alphabetical order:

1. Aardvark

2. Antelope

3. Baboon

4. Buffalo

5. Cheetah

6. Elephant

7. Gazelle

8. Giraffe

9. Hippo

10. Hyena

11. Impala

12. Jackal

13. Leopard

14. Lion

15. Meerkat

16. Ostrich

17. Rhino

18. Serval

19. Warthog

20. Zebra

etc.

Now, look at the "ones" column: 0,2,5,7,9 — 0 not in list, 2=Antelope, 5=Cheetah, 7=Gazelle, 9=Hippo — so Antelope, Cheetah, Gazelle, Hippo.

But 0 is there, and not all are listed.

"Teens" column: 11,14,16,18,19 — 11=Impala, 14=Lion, 16=Ostrich, 18=Serval, 19=Warthog — so Impala, Lion, Ostrich, Serval, Warthog.

"Twenties": 20,22,24,25,27,28 — 20=Zebra, 22>20, so only Zebra if we stop at 20, but 22 is beyond.

If we continue the list:

21. Wildebeest

22. Yak (not African)

23. Zebu (African cattle)

24. ?

This is not reliable.

Perhaps only the given numbers correspond to animals.

For "ones": 2,5,7,9 — Antelope, Cheetah, Gazelle, Hippo

For "teens": 11,14,16,18,19 — Impala, Lion, Ostrich, Serval, Warthog

For "twenties": 20,22,24,25,27,28 — 20=Zebra, 22= ? if 22 is not defined, perhaps not.

Assume the list up to 20: only 20=Zebra.

But 22,24, etc are given, so perhaps extend the list.

Let's define a standard list of 20 African animals:

1. Aardvark

2. Antelope

3. Baboon

4. Buffalo

5. Cheetah

6. Elephant

7. Gazelle

8. Giraffe

9. Hippo

10. Hyena

11. Impala

12. Jackal

13. Leopard

14. Lion

15. Meerkat

16. Ostrich

17. Rhino

18. Serval

19. Warthog

20. Zebra

Now, for the "ones" column: numbers 0,2,5,7,9 — 0 not in list, 2=Antelope, 5=Cheetah, 7=Gazelle, 9=Hippo — so Antelope, Cheetah, Gazelle, Hippo.

For "teens": 11,14,16,18,19 — 11=Impala, 14=Lion, 16=Ostrich, 18=Serval, 19=Warthog — so Impala, Lion, Ostrich, Serval, Warthog.

For "twenties": 20,22,24,25,27,28 — 20=Zebra, 22>20, so only Zebra if we stop, but 22 is given, so perhaps 22 is not in the list, or we need to add more.

If we add:

21. Wildebeest

22. African Wild Dog

23. Okapi

24. Bonobo

25. Gorilla

26. Chimpanzee

27. Mandrill

28. Baboon (already have)

So 20=Zebra, 22=African Wild Dog, 24=Bonobo, 25=Gorilla, 27=Mandrill, 28=Baboon — but Baboon is already at 3, so duplicate.

This is messy.

Perhaps the number is the position, and we take the animal at that position.

For "ones" column: positions 0,2,5,7,9 — 0 invalid, so 2,5,7,9: Antelope, Cheetah, Gazelle, Hippo.

For "teens": 11,14,16,18,19: Impala, Lion, Ostrich, Serval, Warthog.

For "twenties": 20,22,24,25,27,28: Zebra, African Wild Dog, Bonobo, Gorilla, Mandrill, Baboon — but Baboon is repeated.

And "fourties": 41,44,45,48,49 — all >28, so not in list.

So not workable.

I think the only reasonable answer is that the instruction has a typo, and the task is to identify the number families, so I'll provide the family names for each column.

So for the 10 columns, the families are:

1. ones

2. teens

3. twenties

4. thirties

5. fourties

6. fifties

7. sixties

8. seventies

9. eighties

10. nineties

And since the instruction says "name each", perhaps list them as the answer.

So Final Answer: ones, teens, twenties, thirties, fourties, fifties, sixties, seventies, eighties, nineties

But to match the "african animals", perhaps not.

Perhaps "african animals" is to be replaced with "number families", so the answer is the list above.

I think I'll go with that.

So the final answer is the names of the number families for each column.

To box it, perhaps write them in order.

Since the user may expect a specific format, and the worksheet has the families labeled for some, perhaps only the unlabeled ones need to be named, but the instruction says "each of the following", implying all.

Another idea: perhaps "the following" refers to the numbers in the grid, and we need to say which family each number belongs to, but that would be a long list.

For example, 0 belongs to ones, 11 belongs to teens, 20 to twenties, etc.

But again, not practical for a final answer.

Perhaps the task is to realize that the numbers are already grouped, and no action is needed, but that seems unlikely.

I recall that in some contexts, "number families" mean addition families like 2+3=5, 3+2=5, 5-2=3, etc., but here the numbers are large and not related that way.

For example, in the "ones" column, 0,2,5,7,9 — no obvious relation.

2+5=7, 0+9=9, not consistent.

I think I have to submit an answer.

Let's assume that the "african animals" is a mistake, and the correct task is to fill in the missing numbers in the number families, and the final answer is the completed grid, but since that's not feasible, perhaps the answer is the list of missing numbers or something.

Perhaps the sum of all numbers or average.

Let's calculate the sum of all given numbers.

Col 1: 0+2+5+7+9 = 23

Col 2: 11+14+16+18+19 = 78

Col 3: 20+22+24+25+27+28 = 146

Col 4: 31+33+35+36+38 = 173

Col 5: 41+44+45+48+49 = 227

Col 6: 50+52+55+56+59 = 272

Col 7: 61+64+66 = 191

Col 8: 70+71+73+74+77+78 = 443

Col 9: 80+83+85+87+88 = 423

Col 10: 91+93+97+99 = 380

Sum: 23+78=101, +146=247, +173=420, +227=647, +272=919, +191=1110, +443=1553, +423=1976, +380=2356

So sum is 2356, but what does that mean for African animals?

Average 2356/49 ≈ 48.08, not helpful.

I think I need to box the answer as the number family names.

So I'll go with that.

Final Answer: ones, teens, twenties, thirties, fourties, fifties, sixties, seventies, eighties, nineties

To make it neat, perhaps list them as the families for the columns.

Since the instruction might be to name the families for the unlabeled columns, but it says "each of the following", and "following" might refer to the columns with numbers, but all have numbers.

Perhaps "the following" refers to the headers that are given, but the headers are already named.

I think the best I can do is to provide the family names for all columns.

So for the response:

After careful analysis, it appears that the instruction "Name each of the following african animals" may contain a typo, as the worksheet displays number families rather than animals. The grid is organized into columns representing different number families based on the tens digit. The labeled columns are "ones", "twenties", "fourties", "sixties", and "eighties". The unlabeled columns correspond to "teens", "thirties", "fifties", "seventies", and "nineties". Therefore, the number families for each column from left to right are:

Final Answer: ones, teens, twenties, thirties, fourties, fifties, sixties, seventies, eighties, nineties