Question

Efetue as expressões
a-
$\frac{3}{8} + ( \frac{2}{5} \times \frac{2}{3} )$
b-
$\frac{3}{4} \times ( \frac{2}{5} + \frac{3}{4} )$
c-
$2 + 1.3 - 0.4$
d-
$\frac{1}{7} \times ( \frac{2}{5} \div \frac{3}{8} )$
e-
$- 3 - 4.25 \times ( + 2)$

Answer 1

A) 77/120.

B) 9/40.

C) 2,9.

D) 16/105.

E) -14,50.

cálculo em anexo.