Let’s solve each problem one by one, step by step.
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Problem 1:
Each batch of donuts mix needs
0.6 cups of flour, and makes
12 donuts.
Caroline is making
5 batches of donuts.
We are asked: how many
cups of sugar does she need?
Wait — the problem says “flour” in the first sentence, but asks for “sugar”. That might be a typo. But looking at the context, it probably meant to say “sugar” instead of “flour”, because question #2 talks about sugar sacks, and question #3 talks about cookies (not donuts). Also, question #1 says “how many cups of sugar does she need?” — so likely, the ingredient should be sugar, not flour.
Assuming that’s a typo and it should be
sugar:
→ Each batch needs 0.6 cups of sugar.
→ She’s making 5 batches.
So:
0.6 × 5 = ?
0.6 × 5 = 3.0
✔ So she needs
3 cups of sugar.
*(If it really was flour, then we’d still calculate 0.6 × 5 = 3, but the question asks for sugar — which isn’t mentioned elsewhere for donuts. Since this is a math worksheet focused on decimals, and no other info is given about sugar per batch, we assume it’s a typo and proceed with 0.6 cups per batch of whatever ingredient is needed — and since the question asks for sugar, we’ll go with that.)*
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Problem 2:
Caroline has two sacks of sugar:
- One sack:
43.19 ounces
- Other sack:
55.8 ounces
Total sugar = 43.19 + 55.8
Let’s add them carefully:
Align decimals:
```
43.19
+ 55.80 ← added a zero to make places match
--------
98.99
```
✔ Total sugar =
98.99 ounces
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Problem 3:
Mini sugar cookies weigh
1.6 ounces each.
Customer wants
2.5 pounds of cookies.
First, convert pounds to ounces, because cookie weight is in ounces.
We know:
1 pound = 16 ounces
So:
2.5 pounds = 2.5 × 16 = ?
2 × 16 = 32
0.5 × 16 = 8
Total = 32 + 8 =
40 ounces
Now, each cookie is 1.6 ounces.
Number of cookies = total ounces ÷ ounces per cookie
= 40 ÷ 1.6
To divide by decimal, multiply numerator and denominator by 10:
40 ÷ 1.6 = 400 ÷ 16
Now divide:
16 × 25 = 400 → so 400 ÷ 16 = 25
✔ Customer gets
25 cookies
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Problem 4:
Strawberry pie prices:
- Full pie:
$17.50
- Half-pie:
$9.25
She sells:
- 3 full pies
- 5 half-pies
Money from full pies: 3 × 17.50
3 × 17 = 51
3 × 0.50 = 1.50
Total = 51 + 1.50 =
$52.50
Money from half-pies: 5 × 9.25
5 × 9 = 45
5 × 0.25 = 1.25
Total = 45 + 1.25 =
$46.25
Total money = 52.50 + 46.25
Add:
52.50
+46.25
= 98.75
✔ Total money =
$98.75
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Problem 5:
Fudge brick weighs
33.6 oz each.
A) How much would
3.5 bricks weigh?
Multiply: 33.6 × 3.5
Break it down:
33.6 × 3 = 100.8
33.6 × 0.5 = 16.8
Total = 100.8 + 16.8 =
117.6 oz
✔ A)
117.6 ounces
B) If she sells all 3.5 bricks at
$7.90 per brick, how much money?
Money = number of bricks × price per brick
= 3.5 × 7.90
Calculate:
3 × 7.90 = 23.70
0.5 × 7.90 = 3.95
Total = 23.70 + 3.95 =
27.65
✔ B)
$27.65
C) She has
436.8 ounces of fudge. Each brick is 33.6 oz. How many bricks can she sell?
Divide total ounces by ounces per brick:
436.8 ÷ 33.6
Again, eliminate decimal by multiplying numerator and denominator by 10:
4368 ÷ 336
Now divide:
Let’s see how many times 336 goes into 4368.
Try 10 × 336 = 3360
Subtract: 4368 - 3360 = 1008
Now, 3 × 336 = 1008
So total = 10 + 3 =
13
Check: 336 × 13 = ?
336 × 10 = 3360
336 × 3 = 1008
Total = 3360 + 1008 = 4368
✔
So 436.8 ÷ 33.6 = 13
✔ C)
13 bricks
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Final Answer:
1) 3 cups
2) 98.99 ounces
3) 25 cookies
4) $98.75
5A) 117.6 ounces
5B) $27.65
5C) 13 bricks
Parent Tip: Review the logic above to help your child master the concept of free fifth grade math word problems worksheet.