Question

Exercício

1- Calcule:

a) (– 3 ) . ( – 9)=

b) (– 7) . (+10) =

c) (+15) : (+3) =

d) (+40) : (– 5) =

e) 8 . ( – 6) . (– 2) =

f) 45 – { 4 . [( 9 . 12 – 14 . 7 ) : ( 15 – 5 . 2 )]} =

Answer 1

Resposta:

Explicação passo-a-passo:

a) (– 3 ) . ( – 9)=  27

b) (– 7) . (+10) =  -70

c) (+15) : (+3) = 5

d) (+40) : (– 5) =  -8

e) 8 . ( – 6) . (– 2) =  8 . 12 = 96

f) 45 – { 4 . [( 9 . 12 – 14 . 7 ) : ( 15 – 5 . 2 )]} =

 45 - {4 . [ ( 108 - 98) ÷ (15 - 10) ] =

45 - { 4 . [ 10 ÷ 5 ]=

45 - [ 4 . 2 ] =

45 - 8 = 37

Answer 2

Resposta:

A) =27

B)=70

C)=5

D)=-8

E)=96