Adding Tens and Ones
2 + 10
12
5 + 10
15
10 + 3
13
10, 20, __, __, 50
30, 40
11 + 10
21
5 + 30
35
9 + 10
19
20 + 3
23
1, 11, 21, 31, __
41
12 + 10
22
7 + 20
27
3 + 20
23
30 + 3
33
2, 12, 22, __, 42
32
10 + 10
20
6 + 30
36
8 + 30
38
40 + 3
43
5, 15, __, __, 45, 55
25, 35
20 + 10
30
9 + 40
49
7 + 40
47
50 + 3
53
9, __, 29, 39, __
19, 49
30 + 10
40