Adding up to 10
subtracting up to 10
100
1+8
9
100

9-2

7

200
9+1
10
200

10 - 3


7

300
4+7
11
300

6 - 2

4

400
2+6
8
400

8 - 7

1

500
5+5
10
500

10 - 5

5