Question

efetue as adicoes 
1/3+1/5
3/4+1/2
2/4+2/3
2/5+3/10
4/3-1/2
13/4-5/6
7/8-1/6
5/4-1/2

Answer 1

1/3+1/5 (mmc de 3 e 5= 15)
(5+3)/15
8/15

3/4+1/2 ( mmc de 4 e 2= 4)
(3+2)/4
5/4

2/4+2/3 (mmc de 4 e 3= 12)
(6+8)/12
14/12 ( simplificando 14 e 12 por 2)
7/6

2/5+3/10 (mmc de 5 e 10= 10)
(4+3)/10
7/10

4/3-1/2 (mmc de 3 e 2= 6)
(8-3)/6
5/6

13/4-5/6 (mmc de 4 e 6 =12)
(39-10)/12
29/12

7/8-1/6 (mmc de 8 e 6= 24)
(21-4)/24
17/24

5/4-1/2 (mmc de 4 e 2= 4)
(5-2)/4
3/4