Question

Matematica 7 ano Pfv Me Ajuda Pra 06/03/2017

Calcule As expressões Fracionarias. / Fraçao ( ) parênteses :)

A)3/5 -1 - 2/5=

B) 4 -1/10 + 2/5=

C) 1/2 - (-3/5) + 7/10 =

D) -2-(-1/2) - 1/8=

E) 5/12 + (-1/4) - (+1/6)=

Answer 1

A) 3/5 - 1 - 2/5 = 3/5 - 2/5 - 1 = 1/5 - 1 = 1/5 - 5/5 = -4/5
B)4 - 1/10 + 2/5 = 40/10 - 1/10 + 4/10 = 44/10 - 1/10 = 43/10
C)1/2 - (3/5) + 7/10 = 1/2 + 3/5 + 7/10 = 5/10 + 6/10 + 7/10 = 18/10 = 9/5
D)-2 - (-1/2) - 1/8 = -2 + 1/2 - 1/8 = - 2 + 1/2 - 1/8 = -16/8 + 4/8 - 1/8 = -13/8
E)5/12 + 1/4  - 1/6 = 5/12 + 3/12 - 2/12 = 8/12 - 2/12 = 6/12 = 1/6