Question

b) -15 + [(-12) - (+4)] – (-7 — 4)
c) 45 - {51 + [(-3) - (+8)]}

Reposta com cálculo pfv

Answer 1

b) -15 +[(-12) - (+4)] - (-7 -4)

-15 +[ -12 -4] +7+4=

-15 +[ -16] +11=

-15 -16 +11=

-31 +11=

-20

c) 45 - { 51 + [(-3) - (+8)]}

45 - {51 + [-3 -8]} =

45 - { 51 + [ -11] =

45 - {51 -11} =

45 - {+ 40} =

45 -40 =

+5