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Decimal Addition Subtraction Worksheet

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Decimal Addition Subtraction Worksheet

Practise adding and subtracting decimals to three decimal places. Estimate each answer first, line up the decimal points, and use an inverse operation to check where you can.

Decimal calculations

Use the place-value grid if it helps you keep the decimal points aligned. Record an estimate before working out each exact answer.

Ones

Decimal point

Tenths

Hundredths

Thousandths

1.Estimate, then calculate: 6.482 + 3.7 = _____.

2.Estimate, then calculate: 14.06 − 8.275 = _____.

3.Estimate, then calculate: 18.35 + 6.728 + 2.4 = _____.

4.Estimate, then calculate: 20.004 − 9.68 = _____.

Wildlife sanctuary problems

Show the calculations you use. Give units with each answer.

5.At a sanctuary kiosk, Aisha buys a fruit cup for $4.65 and a drink for $3.80. Estimate the total cost, then calculate the exact amount she pays.

6.Wiremu measures 7.6 m of hose for an enclosure. He uses 2.85 m. Estimate how much remains, then find the exact length left.

7.A young seal weighs 18.725 kg and a second seal weighs 16.9 kg. How much heavier is the first seal? Give an estimate and the exact difference.

Multi-step and challenge problems

Break each problem into clear steps. Check your result using an inverse operation when possible.

8.Hugo is collecting $286.75 for sanctuary equipment. He has raised $138.90, then receives a further donation of $42.65. First find his new total, then calculate how much more is needed to reach the target.

9.A sanctuary's food-preparation limit is 6 kg. A batch contains 2.425 kg of vegetables, 1.36 kg of feed mix and 0.875 kg of supplements. Find the batch's total mass, then work out how much mass remains below the limit.

10.A 5 m length of tubing is cut into three pieces measuring 1.425 m, 1.08 m and 0.935 m. Each cut uses up 0.004 m of tubing, and two cuts are made. Calculate the combined length of the pieces, the total lost in the cuts, and the tubing left over.

11.Work out 23.456 − 8.719 + 6.84 − 2.307. Show the operations in order.

12.Select the correct value of 7.86 + 4.295.

12.155
12.156
11.155
12.055

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More Maths Worksheets

Year 7

Decimal Addition Subtraction Worksheet

Decimal Addition Subtraction Worksheet

Decimal calculations

Wildlife sanctuary problems

Multi-step and challenge problems

3 printable pages

About This Worksheet

Free in Kuraplan

Print-Ready

AI-Generated

For Teachers & Parents

Need a custom version of this worksheet?

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