Question

me ajudem a calcular questões 25

Answer 1

a
( -1/3) - ( -1/5) = -1/3 + 1/5 = 
mmc = 15
( -5 + 3)/15 = - 2/15 ****
b
( +2,5) - ( -6) + ( - 5/2) =
( + 2,5 + 6/1 - 5/2 ) =
2,5 + 6 - 2,5 = 11 ****
c
1 - ( 2/3 + 1/6 + 1/4) =
1/1 - 2/3 - 1/6 - 1/4 =
mmc = 12
( 12 - 8 - 2 - 3 )/12  =
( 12 - 13)/12   =  - 1/12 **
d
( -5/1 ) * ( -1/3) * ( +3/1) =  +  15/3 = 5 ***