Edexcel IGCSE Math A 1.2.F add and subtract fractions and mixed numbers

Practise fraction addition and subtraction by converting mixed numbers, using common denominators and simplifying final answers.

Exam points

Use a common denominator to add or subtract fractions and reach a shown result.
Convert mixed numbers to improper fractions before adding or subtracting.
Simplify the final improper fraction or convert it back to a mixed number.

[Maximum number: 3]

Show that $3 \frac{5}{7}+1 \frac{2}{3}=5 \frac{8}{21}$

$3\frac57=\frac{26}{7},\qquad 1\frac23=\frac{5}{3}$ $\frac{26}{7}+\frac{5}{3} =\frac{78}{21}+\frac{35}{21} =\frac{113}{21} =5\frac{8}{21}$

M1 for correct improper fractions or suitable common-denominator fractional parts. M1 for correct addition with a common denominator. A1dep for a fully correct shown result.

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1.2.F Adding and subtracting fractions question 1