Question

a) 3/4+1/3-1/6 =
b)1/2+ 1 1/3-1 1/4=
c)11/12-5/6+2/9=

Answer 1

Olá,

A) 3/4+1/3-1/6 =

mmc(4,3,6)=12

3x3/4x3+1x4/3x4-1x2/6x2=
9/12+4/12-2/12 =
9/12+2/12 =
11/12

b)1/2+ 1 1/3 -1 1/4=

1 1/3 =4/3
1 1/4=5/4

mmc(2,3,4)=12

1x6/2x6+4x4/3x4-5x3/4x3= 
6/12+16/12-15/12 = 
6/12+1/12 = 
7/12

c)11/12-5/6+2/9=

mmc(12,6,9)=36

11x3/12x3-5x6/6x6+2x4/9x4= 
33/36-30/36+8/36 = 
3/36+8/36 = 
11/36