Let's solve each problem step by step and explain the reasoning:
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Problem 1:
Question: A ream (500 sheets) of paper is 4 cm thick. How thick would 9 reams be?
Solution:
- Thickness of 1 ream = 4 cm
- Number of reams = 9
- Total thickness = \( 4 \times 9 = 36 \) cm
Answer: \( 4 \times 9 = 36 \) cm
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Problem 2:
Question: You get 8 apples in a bag. How many apples in 5 bags?
Solution:
- Apples per bag = 8
- Number of bags = 5
- Total apples = \( 8 \times 5 = 40 \)
Answer: \( 5 \times 8 = 40 \) apples
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Problem 3:
Question: I share 8 chocolates equally between my 2 friends. How many chocolates do they each get?
Solution:
- Total chocolates = 8
- Number of friends = 2
- Chocolates per friend = \( 8 \div 2 = 4 \)
Answer: \( 8 \div 2 = 4 \) chocolates each
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Problem 4:
Question: A pen costs $7 to buy. How much would 6 pens cost?
Solution:
- Cost of 1 pen = $7
- Number of pens = 6
- Total cost = \( 7 \times 6 = 42 \)
Answer: \( 7 \times 6 = \$42 \)
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Problem 5:
Question: A PP9 battery has 9 volts. If I connect 3 batteries together, how many volts would the circuit have?
Solution:
- Voltage of 1 battery = 9 volts
- Number of batteries = 3
- Total voltage = \( 9 \times 3 = 27 \) volts
Answer: \( 9 \times 3 = 27 \) volts
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Problem 6:
Question: How many legs would 7 cats have?
Solution:
- Legs per cat = 4
- Number of cats = 7
- Total legs = \( 4 \times 7 = 28 \)
Answer: \( 7 \times 4 = 28 \) legs
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Problem 7:
Question: Tyger downloads 3 new apps a week for his tablet. How many apps will he have after 10 weeks?
Solution:
- Apps downloaded per week = 3
- Number of weeks = 10
- Total apps = \( 3 \times 10 = 30 \)
Answer: \( 3 \times 10 = 30 \) apps
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Final Answers:
1. \( 4 \times 9 = 36 \) cm
2. \( 5 \times 8 = 40 \) apples
3. \( 8 \div 2 = 4 \) chocolates each
4. \( 7 \times 6 = \$42 \)
5. \( 9 \times 3 = 27 \) volts
6. \( 7 \times 4 = 28 \) legs
7. \( 3 \times 10 = 30 \) apps
\boxed{36, 40, 4, 42, 27, 28, 30}
Parent Tip: Review the logic above to help your child master the concept of 3rd grade math multiplication word problems.