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Decimal Operations Practice

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Decimal Operations Practice

Show your working where asked. Use estimation to check whether each exact answer is reasonable. Write money amounts in dollars.

Multiply Decimals

1.Estimate 3.7 × 6 by rounding 3.7 to the nearest whole number, then calculate the exact product.

2.Calculate 0.8 × 9.

3.At a local bakery, Anahera buys 5 savoury pastries for $3.45 each. What is the total cost?

4.Which calculation has the greatest product?

2.6 × 4
1.9 × 6
0.8 × 14
3.1 × 3

5.Calculate 2.35 × 1.2. Show how you account for the decimal places.

Divide Decimals

6.Work out 7.56 ÷ 3.

7.Find 6.72 ÷ 8.

8.Tevita has 15.75 metres of ribbon and cuts it into 7 equal lengths. What is the length of each piece?

9.A 4.8 kg bag of flour is shared equally between 12 bakery batches. How many kilograms of flour are used for each batch?

Estimate, Reason and Solve

10.Round 5.86 to the nearest tenth. Use the rounded value to estimate 5.86 × 4, then give the exact product.

11.Calculate 0.6 × 0.25. Explain using place value why the product is less than 0.25.

12.A bakery recipe uses 0.85 kg of sugar for one batch. How much sugar is needed for 4 batches?

13.Select all the useful ways to check or simplify decimal calculations.

Round the numbers to estimate before calculating.
Use place value to track the size of the answer.
Remove the decimal points and use the resulting whole-number answer without adjustment.
Multiply or divide by powers of 10 to make an equivalent calculation.

14.A tray of 8 identical bakery rolls costs $13.20 altogether. What is the price of one roll?