Addition
Subtraction
100

8+8=


16


100

5 - 1 = 

4

200

3 + 3 + 1=

7

200

10 - 2 =

8

300

6+7 =

13

300

8 - 3 =

5

400

40+ 50= 

90


400

90 - 60 =

30

500

21+ 8= 

39

500

13 - 9= 

35