Question

Calcule o valor das expressões numéricas.
a) 20:4+3 -2 -15:3
b) (-31 +5-39:(-13)) - 2
c) -45 - {5. [19.12 - 14.7): (15-5-2)]
d) (+3) - (-3)+2[-65:(-18+1.5))
meajude porfavom​

Answer 1

A) 20:4+3-2-15:3

5+3-2-5

R: 1

B) (-31+5-39:(-13))-2

(-31+5+3)-2

(-23)-2

-23-2

R: -25

C) -45- {5.[ 19.12-14.7):(15-5-2)]

-45-(5×4,42÷)

-45-2,7625

R: -47,7625

D) (+3)-(-3)+2[-18+1.5))

3+3+3×(-65+(-16,5))

6+2×(-65+(-33/2))

6+2×(65×2/33)

6+2×130/33

6+260/33

R: 458/33

espero ter ajudado!