Question

Calcule o valor das expressões
A) 15-(3-2)+(7-4)
B) -8-[-2-(-12)+3]
C) -4+[-3+(-5+9-2)]
D) -6-[10+(-8-3)+3]

Answer 1

a)15 - 1 + 3
=17
b)-8-[-2+12+3]
-8+2-12-3
= -21

Answer 2

Demorei pra responder, mais tá bem explicadinho, rsrs...
Bons estudos..

a) 15-(3-2)+(7-4)
15-1+3
14+3
17

b) -8-[-2-(-12)+3]
-8-[-2+12+3]
-8-[10+3]
-8-13
-21

c) -4+[-3+(-5+9-2)]
-4+[-3+(4-2)]
-4+[-3+2]
-4+[-1]
-4-1
-5

d)-6-[10+(-8-3)+3]
-6-[10+(-11)+3]
-6-[10-11+3]
-6-[-1+3]
-6-2
-8