Question

Oi podem me ajudar por favor .:

Answer 1

Resposta: a) -49 b) -15/8 c) -12/5 d) 21/50

Explicação passo a passo:

A)

-15.3-(18.2/9)

-15.3-(2.2)

-45-(2.2)

-45-4

-49

B)

(3.1/6-7/4)÷2/3

(1/2-7/4).2/3

-5/4.3/2

-15/8

C)

-(1/2-5/2).(2/5)÷1/3

-(-2).(-2/5)÷1/3

2.(-3/5)÷1/3

-2.2/5÷1/3

-2.2/5.3

-12/5

D)

-1/5(-(-6/5+3/10)+(-3))

-1/5(-(-9/10)+(-3))

-1/5(9/10-3)

-1/5(-21/10)

1/5.21/10

21/50