Addition
8+10
18
20-10
10
Which digit is in the tens? 3456
5
Skip count by 2's from 2-20
2, 4, 6, 8, 10, 20
10+10
20
40-10
30
Which digit is in the units? 3738
8
Skip count by 10s from 10-100
10, 20, 30, 40, 50, 60, 70, 80, 90, 100
12+7
19
17-5
12
Which digit is in the thousands? 2039
2
Skip count by 5s from 5-30
5, 10, 15, 20, 25, 30
5+9
14
25-5
5
Which digit is in the hundreds? 679
6
Skip count by 2s from 12-24
12, 14, 16, 18, 20, 22, 24
18+6
24
27-6
21
Which digit is in the thousands? 4830
4
25, 30, 35, 40, 45, 50