Let’s go step by step through each problem.
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Problem 1: Write the word name for the following.
a. 43 → This is “forty-three”
b. 18 → This is “eighteen”
*(Note: We write numbers from 21 to 99 with a hyphen between tens and ones, like forty-three. Numbers 13–19 are special words like eighteen.)*
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Problem 2: Put in the missing numbers.
Sequence: 10, ___, 30, ___, 50, ___, 70
Look at the pattern:
From 10 to 30 → that’s +20 over two steps → so each step is +10? Let’s check:
If we add 10 each time:
- 10
- 10 + 10 =
20
- 20 + 10 = 30
✔
- 30 + 10 =
40
- 40 + 10 = 50
✔
- 50 + 10 =
60
- 60 + 10 = 70
✔
Perfect! So missing numbers are:
20, 40, 60
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Problem 3: Put the numbers in ascending order.
Numbers given: 42, 13, 25, 9
Ascending means smallest to largest.
Compare them:
- 9 is smallest
- Then 13
- Then 25
- Then 42
So order:
9, 13, 25, 42
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Problem 4: Put in < or >
We compare the numbers on left and right.
a. 29 ___ 19 → 29 is bigger than 19 → use
>
b. 53 ___ 56 → 53 is smaller than 56 → use
<
c. 17 ___ 20 → 17 is smaller than 20 → use
<
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Now let’s double-check everything:
✔ Problem 1:
a. 43 → forty-three
b. 18 → eighteen
✔ Problem 2: Sequence increases by 10 → 10, 20, 30, 40, 50, 60, 70 → correct.
✔ Problem 3: Ascending order of 42, 13, 25, 9 → 9, 13, 25, 42 → correct.
✔ Problem 4:
a. 29 > 19 ✔️
b. 53 < 56 ✔️
c. 17 < 20 ✔️
All answers verified.
──────────────────────────────────────
Final Answer:
1. a. forty-three
b. eighteen
2. 20, 40, 60
3. 9, 13, 25, 42
4. a. >
b. <
c. <
Parent Tip: Review the logic above to help your child master the concept of number concepts worksheet.
