Addition
7+3=?
10
3-1=?
2
Which number is in the 10's place? 423
2
43
40
10+8=?
18
9-8=?
1
What number is in the hundreds place? 456
4
68
70
8+8=?
16
12-6=?
6
What number is in the one's place? 657
7
123
120
9+4=?
13
12-7=?
5
4
178
180
6+5=?
11
15-9=?
6
9
235
240