Question

Frações
preciso de ajuda com essas 3 frações

Answer 1

F) 2/7*9/3 + 2/6*5/3 -2 =
18/21 + 10/18 -2 =
(324 +210 -378)/378 =
-222/378 = -37/63

G) 2/3*3/7 + 2/5 -40/4 =
6/21 +2/5 -40/4 =
(120 +168 -4200)/420 = - 3912/420 =  -978/105

H) (9/3*4/5)*2/6 - (6+112)/8 = 
36/15*2/6 +106/8 = 72/90 + 106/8 = (576+9540)/720 = 
10116/720 = 281/20