addition
1+1=
2
1_3
2
10, 20, _
30
2 _ 4
2 < 4
2-1=
1
3+1=
4
6_8
7
40. 50. _
60
6 _ 5
6 > 5
4-1=
3
2+2=
4
10_12
11
30, 40, _
50
9 _ 10
9 < 10
3-0=
3
5+1=
6
14_16
15
70, 80, _
90
5 _ 1
5 > 1
1-1=
5+5=
10
19_21
20
80, 90, _
100
1 _ 10
1 < 10
10-1=
9