Question

calcule o valor de cada expressão numérica.
A) 20+[-15-(-5-8)]=
B) 15-(13+11)-[12-(8-13)]=
C) {[15-23+10]-(30-42)}+(-6)=
D) {10-[5+(-8-3)]-2+(7-9)}+(+25)=
obs:com cálculo

Answer 1

A) 20 + [-15-(-5-8)]=
20+ [-15+3]
20-12
8

B)15-(13+11)-[12-(8-13)]=
15-24 - [12-5]
9-7
2

C){[15-23+10]-(30-42)}+(-6)=
{[2] - 12 } + 6
10+6
16

D) {10-[5+(-8-3)]-2+(7-9)}+(+25)=
{10-[5-11] -2 + 2 } + 25
{10-6-0}+25
4+25
29