Question

calcule o valor das expressões
a) 20-6 : (-3/5)
b) 4/9 · (9/-2) - 5/8 : (-16/4)
c) (-4/9+1/15) : (-5/6 - 1/9)

Answer 1

Resposta:

a)20-6÷(-3/5)=

14×(-5/3)=

(14.-5)/3=

-70/3

Explicação passo-a-passo:

b)4/9.(9/-2)-5/8÷(-16/4)=

(-2)-5/8÷(-4)=

(-2)-5 /8×(-1/4)=

(-2) +5/32=

-2.32+5/32=

-64+5/32=

-59/32

c)(-4/9+1/15)÷(-5/6-1/9)=

(-60/135+9/135) ÷ (-15/18- 2/18)

(-51/135)÷(-17/18)=

-51/135 × (-18/17)=

3/135×-18=

-54/135=

-6/15=

-2/5