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Basic Number Operations
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Basic Number Operations
A storm has left a coastal rescue station short on supplies. Solve each number challenge to help the team prepare. Show your working for written questions. Use NZ dollars ($).
Quick calculations
Solve each challenge to work out the supplies available.
1.The station has 268 bottles of water and receives 157 more. How many bottles are there altogether?
2.A crate holds 9 torches. How many torches are in 7 full crates?
- 56
- 63
- 72
- 79
3.There are 144 snack packs to share equally among 8 rescue teams. How many packs does each team receive?
4.A volunteer calculates 5 + 3 × 6 as 48. Is the calculation correct? Write the correct value and explain which operation is done first.
Plan the supply run
Use estimation, inverse operations and written working to check the station’s plan.
5.Estimate 487 + 329 by rounding each number to the nearest hundred. Give your rounded calculation and estimate.
6.A supply list says 236 torches were packed, then 89 were sent to another station. Complete 236 − 89 = ____. Check your answer using addition.
7.Each emergency kit needs 23 bandages. The station prepares 46 kits. Calculate 46 × 23, showing a method that makes your answer clear.
8.The team has 154 batteries and puts 6 in each torch box. How many full boxes can they fill, and how many batteries are left over?
9.A volunteer buys a first-aid refill for $18.75 and a torch for $24.60. Write an equation and find the total cost in NZ dollars.
10.Match each expression to its value: 36 ÷ 4; 8 × 7; 50 − 19; 6 + 5 × 3. Values: 9, 56, 31, 21.
- 36 ÷ 4
- 8 × 7
- 50 − 19
- 6 + 5 × 3
- 56
- 21
- 31
- 9
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