Question

- Efetue:


a) 2/9 + 5/9

b) 4/10 + 2/10

c) 2/5 + 3/10

d) 2/3 + 7/6

e) 1/3 - 1/5

f) 5/4 - 4/5


É PARA HOJE!​

Answer 1

Resposta:

$\frac{2}{9} + \frac{5}{9} = \frac{7}{9}$

$\frac{4}{10} + \frac{2}{10} = \frac{6}{10}$

$\frac{2}{5} + \frac{3}{10 } = \frac{4 + 3}{10} = \frac{7}{10}$

$\frac{2}{3} + \frac{7}{6} = \frac{4 + 7}{6} = \frac{11}{6}$

$\frac{1}{3} - \frac{1}{5} = \frac{5 - 3}{15} = \frac{2}{15}$

$\frac{5}{4} - \frac{4}{5} = \frac{25 - 16}{20} = \frac{9}{20}$