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Number Operations Practice

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Number Operations Practice

Choose operations, solve the problems, and use multiplication or estimation to check your work. Show your thinking where space is provided.

Choose the operation

Select the operation that would solve each problem.

1.Aisha has 36 apples to place equally into 4 supermarket bags. Which operation tells how many apples go in each bag?

Addition (+)
Subtraction (−)
Multiplication (×)
Division (÷)

2.A shelf holds 7 packets of crackers, with 6 crackers in each packet. Which operation finds the total number of crackers?

Addition (+)
Subtraction (−)
Multiplication (×)
Division (÷)

3.Freya has $60 to spend and pays $23 for groceries. Which operation finds how much money remains?

Addition (+)
Subtraction (−)
Multiplication (×)
Division (÷)

Solve the problems

Write an equation and show how you worked it out.

4.A supermarket receives 168 cans and packs them into cartons of 14. How many cartons can be filled?

5.Ana stacks 18 tins on a display each day for 5 days. How many tins does she stack altogether?

6.A supermarket has 9 checkout lanes. Each lane has 24 shopping baskets ready to use. How many baskets are ready altogether?

Check and estimate

Use the inverse operation or a rounded estimate to check each calculation.

7.A worker says 72 ÷ 8 = 9. Check the answer using multiplication, then decide whether the division answer is correct.

8.A cashier calculates 31 × 3 = 93. Estimate by rounding 31 to 30. Does the estimate suggest 93 is reasonable?

Yes; 30 × 3 = 90, which is close to 93.
No; 30 × 3 = 90, so 93 is much too high.
No; 30 × 3 = 90, so 93 is much too low.

Maths vocabulary

Use the operation words to describe answers accurately.

9.Match each term to the operation answer it names.

Product
Quotient
Difference
Sum

Answer to addition
Answer to subtraction
Answer to multiplication
Answer to division

10.Complete the sentence with the correct term: product, quotient or sum. The answer to 7 × 8 is the .

11.Complete the sentence with the correct term: product, quotient or sum. The answer to 54 ÷ 6 is the .

12.Complete the sentence with the correct term: product, quotient, difference or sum. The answer to 42 − 19 is the .

13.Complete the sentence with the correct term: product, quotient or sum. The answer to 26 + 15 is the .

Supermarket shopping

Use New Zealand dollars ($) in your calculations.

14.At a supermarket, one loaf of bread costs $3 and one carton of milk costs $4. Ana buys 4 loaves of bread and 2 cartons of milk. Find each item total and the total amount she pays.

15.Explain how you worked out Ana’s shopping total. Use the words product and sum in your explanation.