Question

Calcule as expressões numéricas:
a) 2 + 8 – 3 – 5 + 15 =
b) 12 + [35 - (10 + 2) +2] =
c) [(18 + 3 · 2) ÷ 8 + 5 · 3] ÷ 6 =
d) 37 + [-25 – (-11 + 19 – 4)] =
e) 18 – 7 + 15 .2 – 2 =
f) 30 { 10 + [ 15 – 7 + ( 18 – 8) ]} =]

Answer 1

Resposta:

a) 10-3-5+15=

7-5+15=

2+15=

17

b) 12+[35-12+2]=

12+[23+2]=

12+25=

37

c) [(18+6)÷8+15]÷6=

[24÷8+15]÷6=

[3+15]÷6=

18÷6=

3

d) 37+[-25-(8-4)]=

37+[-25-4]=

37+(-29)=

8

e)11+15.2-2=

11+30-2=

41-2=

39

f) 30+{10+[8+10]}=

30+{10+18}=

30+28=

58

Espero ter ajudado.