Adding & Subtracting Decimals — Free KS3 Worksheet

A free, printable KS3 worksheet on adding and subtracting decimals using the column method, with a full worked answer key. 16 questions graded easy to hard for Years 7, 8 and 9, including word problems.

Practise adding and subtracting decimals with the column method. Line up the decimal points one above the other, fill any gaps with zeros, then add or subtract each column and bring the decimal point straight down. The questions build from simple sums up to word problems with money and measures, and every one comes with a full worked answer so you can mark it together.