Question

Calcule o valor de cada expressao numerica. A) (18-15+3)+3 b) 30+(50-12-15 c) 13-8+7-42 d)(60-12)-(10+20)-14 e)100-35+15)+(200+135-98) f)200-(40+50)-90-10 ma ajuda pfv

Answer 1

faça primeiro a conta de dentro dos ()

A) (18-15+3)
resolvendo os ()
18-15=3
3+3=6

B)30+(50-12-15)

resolvendo os ()
50-12=38
38-15=23

30+23=53

C) 13-8+7-42
13-8= 5
5+7=12
12-42= -30

D)(60-12)-(10+20)-14
60-12= 48
10+20= 30
ai voce monta=
48-30-14
48-30=18
18-14=4

E) 100-35+15
100-35=65
65+15=80

F)200-(40+50)-90-10
resolvendo o ()
40+50=90

200-90-10
200-90= 110
110-10= 100