Let's solve each problem step by step and identify the "trick" problem that is not a multiplication problem.
---
Problem 1:
Sally shoots an arrow 30 metres. Flame shoots her arrow three times as far. How far did Flame’s arrow go?
- Sally's arrow distance = 30 metres.
- Flame's arrow distance = 3 × 30 metres.
- Calculation: \( 3 \times 30 = 90 \) metres.
Answer: Flame’s arrow went
90 metres.
---
Problem 2:
How many days in 10 weeks?
- There are 7 days in a week.
- Total days in 10 weeks = 10 × 7.
- Calculation: \( 10 \times 7 = 70 \).
Answer: There are
70 days in 10 weeks.
---
Problem 3:
A pencil costs 70p. How much do 2 pencils cost?
- Cost of one pencil = 70p.
- Cost of 2 pencils = 2 × 70p.
- Calculation: \( 2 \times 70 = 140 \) pence.
Answer: 2 pencils cost
140p.
---
Problem 4:
A baseball team has 9 players. In a tournament, there are 5 teams. How many players in total?
- Number of players per team = 9.
- Number of teams = 5.
- Total number of players = 9 × 5.
- Calculation: \( 9 \times 5 = 45 \).
Answer: There are
45 players in total.
---
Problem 5:
Tyger uses bricks which are 4cm tall to build a tower. His final tower is 6 bricks high. How many cm tall is it?
- Height of one brick = 4 cm.
- Number of bricks = 6.
- Total height of the tower = 6 × 4 cm.
- Calculation: \( 6 \times 4 = 24 \) cm.
Answer: The tower is
24 cm tall.
---
Problem 6:
There are 50 pieces in a jigsaw puzzle. How many pieces in 4 puzzles?
- Pieces in one puzzle = 50.
- Number of puzzles = 4.
- Total pieces in 4 puzzles = 50 × 4.
- Calculation: \( 50 \times 4 = 200 \).
Answer: There are
200 pieces in 4 puzzles.
---
Problem 7:
Newton sees 12 frogs in the morning, and 7 frogs in the afternoon. How many frogs did he see in total?
- Frogs seen in the morning = 12.
- Frogs seen in the afternoon = 7.
- Total frogs seen = 12 + 7.
- Calculation: \( 12 + 7 = 19 \).
Answer: Newton saw
19 frogs in total.
---
Problem 8:
A car travels at 40 miles per hour for 3 hours. How far has it travelled?
- Speed of the car = 40 miles per hour.
- Time travelled = 3 hours.
- Distance travelled = Speed × Time.
- Calculation: \( 40 \times 3 = 120 \) miles.
Answer: The car has travelled
120 miles.
---
Identifying the Trick Problem:
The trick problem is the one that is
not a multiplication problem. From the problems above:
- Problems 1, 2, 3, 4, 5, 6, and 8 all involve multiplication.
- Problem 7 involves addition, not multiplication.
Thus, the trick problem is
Problem 7.
---
Final Answer:
\[
\boxed{7}
\]
Parent Tip: Review the logic above to help your child master the concept of 4th grade word problem worksheet.
