Question

5-Calcule a)(-3/4)+(-1/2)÷(+1/4)= b)(-3)÷(+1,25)-(+1,2)÷(-0,6)=
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Answer 1

Resposta: a) $\frac{-7}{4}$

                  b) - 0,4

a)

$\frac{(-3)}{4} + \frac{(-1)}{2} : \frac{(+1)}{4} \\\frac{(-3)}{4} - 1 \\\frac{-3-4}{4}\\\frac{-7}{4}$

b)

(-3) : (1,25) - (1,2) : (0,6) =

(-2,4) - (-2) =

-0,4