Question

Calcule o valor das expressões:

a.
$( - \frac{3}{4} ) + ( + \frac{1}{2}) \div ( + \frac{1}{4}) =$
b. (-3) • (+1,25) – (+1,2) : (-0,6)


Com os cálculos

Answer 1

A)
1/2 ÷ 1/4 =
1/2 × 4/1 = 4/2
4/2 = 2
Resposta. = 2

B)
-3 × 1.25 = -3.75
1.2 ÷ -0.6 = -2
-3.75 - -2 =
-3.75 + 2 = -1.75
Resposta = -1.75

:)