GB-10-02-001 · Adding fractions

Work out $\frac{3}{15}+\frac{8}{15}$ . Give your answer in its simplest form.

Adding & Subtracting Fractions Application of related method — Booklet p. 8 & p. 9

Method

1) Find Lowest Common Denominator (or cross multiply)

2) Add numerators over the common denominator

3) Simplify

Worked Example (GB-10-02-001)

Booklet p. 8–9: Cross-multiply (

\mathbf{\times}

) including the denominators!

1) Use common denominator 15.

\frac{11}{15}

\frac{11}{15}