Question

6) a)- 12 × [-17 + 15 × (+ 59 – 27 – 30) – 21] =
b) + 29 × [-73 +21 × (-47 + 11 + 32) + 155] =
c)-31 × [+65-37×(-61 +26 + 36) -31] =​

Answer 1

Răspuns:

Explicație pas cu pas:

a)-12×[-17+15×(+59-27-30)-21]=

-12×[-17+15×(32-30)-21]=

-12×[-17+15×2-21]=

-12×[-17+30-21]=

-12×[-13-21]=

-12×(-28)=408

b)+29×[-73+21×(-47+11+32)+155]

+29×[-73+21×(-36+32)+155]=

+29×[-73+21×(-4)+155]=

+29×[-73+(-84)+155]=

+29×[-157+155]=

+29×(-2)=-58

c) -31×[+65-37×(-61+26+36)-31]=

-31×[+65-37×(-35+36)-31]=

-31×[+65-37×1-31]=

-31×[+65-37-31]=

-31×[+28-31]=

-31×(-3)=93