Question

calcule
a. (−12) + (−15) =
b. (+212) − 88 =
c. (−122) − (+120) + (+32) − 14 =
d. (+7) ∙ (−10) ∙ (−2) ∙ (+3) =
e. (+45) ÷ (−15) =
f. 30 − 7 ∙ (+7) − (+54) ÷ (−6) =

Answer 1

Resposta:

a) -27  b) 124  c) -224  d) 420  e) -3  f) -10

Explicação passo-a-passo:

a. (−12) + (−15) =

-12 -15 = -27

b. (+212) − 88 =

212 - 88 = 124

c. (−122) − (+120) + (+32) − 14 =

-122 -120 + 32 -14 =

-242 + 32 -14 =

-210 - 14 = -224

d. (+7) ∙ (−10) ∙ (−2) ∙ (+3) =

7.-10 . -2.3 =

-70 . -6 = 420

e. (+45) ÷ (−15) =

45/-15 = -3

f. 30 − 7 ∙ (+7) − (+54) ÷ (−6) =

30 - 7. 7 - 54 ÷ -6 =

30 - 49 + 9 =

-19 + 9 = -10