Question

Efetue as adições e as subtrações :
A)49/7+(-18/3):

B) 79,05-124:

Answer 1

Resposta:

a) $\frac{31}{21}$

b) $\frac{-4.495 }{100}$

Explicação passo-a-passo:

a) 49/7+(-18/3) =

$\frac{49}{7}$ × $\frac{1}{3}$ + $\frac{-18}{3}$ × $\frac{1}{7}$ =

$\frac{49}{21}$ - $\frac{18}{21}$ =

$\frac{31}{21}$

b) 79,05-124 =

$\frac{7905}{100}$ - 124 =

$\frac{7905}{100}$ - $\frac{12400}{100}$ =

$\frac{-4.495 }{100}$