Question

Efetue e quando for possível simplifique :(Fração)
a) (-3/7) • (+3/6)=
b)(-8/5)•0•(+7/10)=
c)(-77/77)•(+26/26)•(-2/2)=
d)(-120/15):(+2/5)=
e)(+18/53):(-9/9)=
f)(-5/9)•(+81/45)•(-18/27)=

Answer 1

a) (- 3/7) . (+ 3/6 ) = - 9/42 ------ - 3/14

b) (- 8/5) . 0 . (+7/10) = 0

c) (- 77/77) . (+26/26) . ( -2/2) = - 1 .1 ---- - 1

d) (-120/15) : (+2/5) = - 8 . 5/2 ------ - 40/2 ----- - 20

e) (+18/53) : ( -9/9) = 18/53 . (-1) ----- - 18/53

f) (-5/9) . (+81/45) . ( -18/27) = (-5/9) . (9/5) . ( - 2/3) ----  90/135 -----

30/45 ----- 10/15 ----- 2/3