Question

Resolva as expressões numéricas:
A)-15+20-30-10+8=
B)-3(-4):(2)=
C){-8+[-4+(-9+8).(3+7)]}=
D)4²-5²+(-3+8)=

Answer 1

Resposta:

a) -27

b) -5

c) -22

d) -4

Explicação passo-a-passo:

a) -15+20-30-10+8

5-30-10+8

-25-10+8

-35+8

-27

b) -3(-4):(2)=

-3-4÷2

-3-2

-5

c) {-8+[-4+(-9+8).(3+7)]}

{-8+[-4+(-1)×(10)]}

{-8+[-4-1×10]}

{-8+[-4-10]}

{-8-14}

-22

d) 4²-5²+(-3+8)

4²-5²+5

16-25+5

-9+5

-4