Question

Por favor me ajude tenho que entrega segunda-feira

Answer 1

Resposta:

a)

$\frac{5}{8} + \frac{2}{8} - \frac{1}{4}$

O MMC de 8 e 4 é : 8

$\frac{5 + 2 - 2}{8} = \frac{5}{8} = 0.625$

b)

$\frac{4}{5} \times \frac{5}{6} \div \frac{3}{2}$

$\frac{4}{6} \div \frac{3}{2} = \frac{4}{6} \times \frac{2}{3} = \frac{8}{18} = \frac{4}{9} = 0.4444....$

c)

$12.5 = \frac{125}{10} \: \: \: e \: \: \: \: 0.5 = \frac{5}{10}$

$\frac{125}{10} \times \frac{5}{10} = \frac{25}{2} \times \frac{1}{2} = \frac{25}{4} = 6.25$