KS3 Fractions
KS3
Free lesson
Number
Fractions
How to Add & Subtract Fractions — KS3 Maths
A clear, step-by-step KS3 lesson on adding and subtracting fractions with different denominators. One method that works every time, with worked examples and a picture of why it works.
Struggling to add and subtract fractions when the bottom numbers are different? This short lesson makes it click using one reliable method — find a common denominator, rewrite the fractions so the bottoms match, then add or subtract the numerators and simplify.
Practise this skill
A free printable worksheet with 16 questions and a full worked answer key. No sign-up needed.