Question

Calcule o valor das expressões:

a)3/5+1/2-2/4

b)2/3+5/6-1/4

c)4/5-1/2+3/4

d)5/7-1/3+1/2

e)2 1/5-1/2+1/5

f)3 - 1/2+1 1/8

Answer 1

aqui vai as respostas

A) 12/20

B) 19/12

C) 21/20

D) 37/42

E) 19/10

F) 31/8

Answer 2

Temos que calcular o M.M.C
a)12/20 + 10/20 -10/20=12/20
simplificando:3/5.
b)8/12+10/12-3/12=15/12.
c)16/20-10/20+15/20=21/20.
d)30/42-16/42+21/42=35/42
simplificando:5/6.
e)42/10-5/10+2/10=39/10.
f)48/16-8/16+22/16=62/16
simplificando:31/8.