Question

3) Calcule as seguintes frações:
(foto)​

Answer 1

Resposta:

b) r: 14 sobre 18

c) r: 24 sobre 35

Answer 2

Resposta:

b) 7/9

d) 21/40

Explicação passo-a-passo:

b) $\frac{7}{6}\div \frac{3}{2}$

$=\frac{7}{6}\times \frac{2}{3}\\=\frac{7}{3}\times \frac{1}{3}\\=\frac{7\times \:1}{3\times \:3}\\=\frac{7}{3\times \:3}\\=\frac{7}{9}$

d) $\frac{3}{5}\cdot \frac{7}{8}$

$=\frac{3\cdot \:7}{5\cdot \:8}\\=\frac{21}{5\cdot \:8}\\=\frac{21}{40}$