Question

Resolva e simplifique as frações.

a)2/3 + 1/2 + 3/5 =
b)1/5 + 6/3 -2/4=
c)2/4 x 1/6 x 4/5=
d)1/8 + 3/5 + 2/6=

Answer 1

a) MMC de 2, 3 e 5

2,3,5 | 2
1,3,5 | 3
1,1,5 | 5
1,1,1 -----
2x3x5 = 30

(2x30/3) + (1x30/2) + (3x30/5) / 30
20 + 15 + 18 / 30
R : 53/30 ou 23
1---
50

b) MMC de 3,4 e 5

1,4,5 | 3
1,1,5 | 4
1,1,1 | 5
------
3x4x5 = 60

(1x60/5) + (6x60/3) - (2x60/4) / 60
12 + 120 + 30 / 60 = 162/60 (/6) = 27/10
R: 27/10 ou 7
2---
10

Termino dps