Post on 03-Jul-2015
SUMA Y RESTA Y
HASTA
10
20
3040
1 2 3 4 5 6 7 8 9
111213141516171819
2122 23 24 25 26 27 28 29
313233343536373839
0
+ 1
10
20
3040
1 2 3 4 5 6 7 8 9
111213141516171819
2122 23 24 25 26 27 28 29
313233343536373839
0
- 1
10
20
3040
2 4 6 8
12141618
22 24 26 28
32343638
0
+ 2
10
20
3040
2 4 6 8
12141618
22 24 26 28
32343638
0
- 2