Let’s solve each problem one by one, step by step.
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Problem 1:
Sylvia used 5/8 pounds of soil in her garden. How many ounces did she use?
We know:
→ 1 pound = 16 ounces
So to find how many ounces are in 5/8 of a pound:
Multiply 5/8 × 16
First, write 16 as a fraction: 16/1
Now multiply: (5 × 16) / (8 × 1) = 80 / 8 = 10
✔ So Sylvia used
10 ounces.
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Problem 2:
Trent read for 2 hours and then did 55 minutes of homework. How many more minutes did Trent spend reading than doing homework?
First, convert 2 hours into minutes:
→ 1 hour = 60 minutes
→ 2 hours = 2 × 60 = 120 minutes
He spent 120 minutes reading and 55 minutes on homework.
Now subtract: 120 - 55 = 65
✔ Trent spent
65 more minutes reading than doing homework.
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Problem 3:
Lars is 45 centimeters taller than his sister Stella. She is 1.2 meters tall. How tall is Lars in centimeters?
First, convert Stella’s height to centimeters:
→ 1 meter = 100 centimeters
→ 1.2 meters = 1.2 × 100 = 120 centimeters
Lars is 45 cm taller → 120 + 45 = 165
✔ Lars is
165 centimeters tall.
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Problem 4:
In his freezer, George has 2 gallons of chocolate ice cream and 9 quarts of vanilla ice cream. How many quarts of ice cream does George have in all?
We need everything in quarts.
We know:
→ 1 gallon = 4 quarts
So 2 gallons = 2 × 4 = 8 quarts
Add the vanilla: 8 quarts (chocolate) + 9 quarts (vanilla) = 17 quarts
✔ George has
17 quarts total.
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Bonus Problem:
How many pounds are in 3 1/2 tons?
We know:
→ 1 ton = 2000 pounds
So 3 1/2 tons = 3.5 tons
Multiply: 3.5 × 2000
Break it down:
→ 3 × 2000 = 6000
→ 0.5 × 2000 = 1000
→ Total = 6000 + 1000 = 7000
✔ There are
7000 pounds in 3 1/2 tons.
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Final Answer:
1. 10 ounces
2. 65 minutes
3. 165 centimeters
4. 17 quarts
Bonus: 7000 pounds
Parent Tip: Review the logic above to help your child master the concept of customary conversion word problems worksheet.