Question

Calcule: A) 1/2-3/4+7 ? B) 3/5+1/2-5/3 C) 7/4-6/8 D) 1/4+1/6-1/9 E) 6/3+1/7 F) 5+6/5-1/9 Gente esses tracos significa "Sobre" Por favor Me Ajudem!

Answer 1

A)
MMC( 2,4,1)=4
1/2-3/4+7
(2-3+28)/4=27/4

B)
mmc(5,2,3)=30
3/5+1/2-5/3
(18+15-50)/30=-17/30

C) mmc(4,8)=8
7/4-6/8=
(14-6)8=
8/8=1

D) mmc(4,6,9)=36
1/4+1/6-1/9=
(9+6-4)/36=11/36

E) mmc(3,7)=21

6/3+1/7 =
(42+3)/21=
45/21= simplificando por 3 fica 15/7

F)
mmc(1,5,9)=45
5+6/5-1/9 =
225+54-5/45=274/45