Question

4/5-1/2=
5/9.2/6=
9/15:3/2=
2/7+5/14=
3/8-1/4


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Answer 1

$\frac{4}{5} - \frac{1}{2} = \frac{4 \times 2 - 5 \times 1}{10} = \frac{8 - 5}{10} = \frac{3}{10} \\ \frac{5}{9} \times \frac{2}{6} = \frac{5 \times 2}{9 \times 6} = \frac{10}{54} \\ \frac{9}{15} \div \frac{3}{2} = \frac{9}{15} \times \frac{2}{3} = \frac{18}{45} = \frac{6}{15} = \frac{2}{5} \\ \frac{2}{7} + \frac{5}{14} = \frac{2 \times 2 + 5}{14} = \frac{9}{14} \\ \frac{3}{8} - \frac{1}{4} = \frac{3 - 2 \times 1}{8} = \frac{3 - 2}{8} = \frac{1}{8}$

Espero ter ajudado