Question

calcule a) (+5/8)×(-4/3)= b) (+7/6) ÷ (-1/7)= c) (-4/5)×(-7/4) d) (+3/7):(21/49)​

Answer 1

Resposta:

Explicação passo a passo:

Calcule

a) (+5/8)×(-4/3)=

= - 5/8 . 4/3

= -5/3 . 4/8 (:4)/(:4)

= -5/3 . 1/2

= -5/6

b) (+7/6) ÷ (-1/7)=

= - 7/6 . 7/1

= - 49/6

c) (-4/5)×(-7/4)

= 4/5 . 7/4

= 4/4 . 7/5

= 7/5

d) (+3/7):(21/49)​

= 3/7 . 49/21

= 3/21 (:3)/(:3) . 49/7

= 1/7 . 49/7

= 1/7 . 7

= 7/7

= 1