Adding and Subtracting Decimals Worksheets

Free printable worksheets with answer keys. Pick a level, preview the questions, then open the sheet to swap or delete any single question.

Grade 5CCSS 5.NBT.B.7Answer key includedPDF · Print

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Easy: Tenths

Preview shows 6 of 12 questions. Every sheet is new; open it to change any question.

Worksheet variations

Line up the decimal points so tenths are added to tenths and hundredths to hundredths. Writing a zero to fill an empty place, as in 3.4 = 3.40, keeps the columns straight.

EasyTenths MediumHundredths HardDifferent places, and whole numbers minus decimals

How to solve it: a worked example

Add or subtract.

Start
Line up the decimal points
Answer

Common mistakes to watch for

Lining up the last digits instead of the decimal points, so 3.4 + 2.15 becomes 2.49.
Forgetting to regroup across the decimal point.
In 6 − 2.35, writing 4.35 because the 6 has no hundredths to subtract from.

Tip: tick “Step-by-step answer key” in the generator to print each step for marking.

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FAQ

Why line up the decimal points?

Lining up the points lines up the places: tenths with tenths, hundredths with hundredths. Adding a zero (4.5 = 4.50) helps fill empty places.

How do you subtract a decimal from a whole number?

Write the whole number with a decimal point and zeros: 7 − 2.35 becomes 7.00 − 2.35 = 4.65.

Is every worksheet different?

Yes. Numbers are generated each time, and the answer key is calculated for that sheet. Swap any single question and its answer updates too.

Can I mix adding and subtracting decimals with other skills?

Yes. In the generator, add more skills; each gets its own section on the sheet with its own instructions.

Is it free to print?

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