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Basic Operations Practice
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Basic Operations Practice
Solve each problem and show your working. Estimate where asked, then use your estimate to check that your exact answer is sensible.
Mental Calculations and Estimation
1.Calculate 58 + 27. Give an estimate by rounding each number to the nearest ten.
2.Calculate 203 − 78. Give an estimate by rounding each number to the nearest ten.
3.Calculate 34 × 18. Estimate by rounding each factor to the nearest ten.
4.Calculate 168 ÷ 14. Use a multiplication fact to check your result.
Shopping Calculations
5.For a community barbecue, a pack of veggie patties costs $11.60 and a pack of buns costs $4.25. What is the total cost of 3 patty packs and 5 bun packs?
6.A sports club has $120 to spend on drink bottles. Each bottle costs $7.80. What is the greatest number of bottles they can buy, and how much money will remain?
Recipe and Measurement Calculations
7.A soup recipe serves 8 people and uses 600 mL of stock. How much stock is needed to make enough soup for 20 people?
8.A baker has 3.2 kg of oats. Each batch uses 425 g. How many complete batches can be made, and how many grams of oats will be left?
Choose the Operation
Choose the operation that best solves each problem, then calculate.
9.A hall has 1,344 chairs arranged equally in 28 rows. How many chairs are in each row?
- Addition
- Subtraction
- Multiplication
- Division
10.A theatre has 36 rows with 42 seats in each row. What is the theatre's total seating capacity?
- Addition
- Subtraction
- Multiplication
- Division
Multi-Step Money Problems
11.A delivery driver earns $21.40 per hour and works 12 hours in one week. They spend $38.50 on fuel that week. How much remains from that week's earnings after paying for fuel?
12.Two adults and three children visit a wildlife centre. Adult entry costs $19.50 each and child entry costs $11.80 each. They also buy a family guidebook for $8.75. What is their total cost?
Check and Explain
13.Which strategies give a useful nearby estimate of 49 × 21 by rounding to the nearest ten? Select every correct answer.
- Round 49 to 50 and 21 to 20
- Round both factors to the nearest hundred
- Rewrite 49 × 21 as 49 × (20 + 1)
- Use 50 × 20 as a nearby benchmark
14.Explain one way to check whether an answer to a multiplication problem is reasonable. Include a brief example.
15.Write one calculation strategy from this worksheet that you could use again. Give an example calculation where it would help.
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