Question

resouva as expressões neméricas:


a) (+39) : 3 + 5=


b)(-1)7-(-4)3:(+2)3

Answer 1

a) (+39) : 3 + 5=

13 + 5

18

b)(-1)7-(-4)3:(+2)3

-7-(-12 : 2 × 3)

-7-(-6 × 3)

-7-(-18)

-7 + 18

11

Answer 2

a) (+39) : 3 + 5=

(39 : 3) + 5

13 + 5

18

b)(-1)7-(-4)3:(+2)3

(-1) × 7 → -7

-7-(-4) × 3 : (2) × 3

(-4) × 3 : (2) × 3

-12 : (2) × 3 -6 × 3 → -18

-7-(-18)

-7+18

11