Adding Decimals to Hundredths
Decimals show up every day, from price tags at the shop to lengths on a measuring tape. In this free activity, children add pairs of decimal numbers with tenths and hundredths, such as 3.45 + 2.80. Each question is set out so the decimal points can be lined up neatly, which is the secret to getting decimal sums right every time.
Questions are generated fresh each visit, so children can practise again and again, or print a worksheet for homework, classroom warm-ups or quiet holiday practice at home.
How to play
- Look at the first sum and write the two numbers one under the other, keeping the decimal points in a straight line.
- Add the hundredths, then the tenths, then the ones, carrying over to the next column when a total reaches ten.
- Place the decimal point in the answer directly below the others, then type or write your answer.
- Check all your answers, then click to make a new set or print the page for extra practice.
This activity helps your child add decimal numbers with confidence. Children practise place value to hundredths, lining up decimal points, carrying between columns and writing answers in the correct form, such as 7.05 rather than 7.5. These are the same steps used when adding money or measurements, so the skill transfers straight into real life: totalling a shopping list, adding rainfall readings or combining lengths in metres. Working through ten questions at a time keeps practice short and steady. If your child finds it tricky, suggest writing a zero as a placeholder, for example 2.6 as 2.60, so both numbers have the same number of decimal places.
Frequently asked questions
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Updated 5 Nov 2026