Show:
Addition W/O Regrouping
Addition W/ Regrouping
Addition & Subtraction
Subtraction W/O Regrouping
Subtraction W/ Regrouping
100
18 + 21 =
39
100
18 + 5 =
23
100

5 + 6 = 

11

100

27 - 6 =

21

100
23 - 6 =
17
200
20 + 7 =
27
200
24 + 9 =
33
200

12 - 5 =

7

200
29 - 23 =
3
200
24 - 8 =
16
300
53 + 44 =
97
300
5 + 26 =
31
300

16 - 8

8

300
31 - 20 =
11
300
36 - 9 =
27
400
66 + 33 =
99
400
16 + 7 =
23
400

34 + 5

39

400
36 - 5 =
31
400
25 - 16 =
9
500
30 + 8 =
38
500
25 + 15 =
40
500

26 - 6 =

20

500
38 - 8 =
30
500
20 - 18 =
2