Adding Ones
3+5
8
10 + 10
20
1 Tens + 1 Ones
11
24 - 4
20
8+3
11
1 Tens + 2 Tens
3 Tens
2 Tens + 5 ones
25
31 - 3
28
10 + 5
15
4 Tens + 3 Tens
7 Tens
5 Tens + 7 ones
57
45 - 7
38
17 + 6
24
50 + 2 Tens
70
6 Tens + 1 Tens + 3 Ones
73
78 - 9
69
56 + 8
64
20 + 30 + 40
90
3 Tens + 2 Ones + 5 Tens + 1 Tens
92
88 - 12
76