Show:
Adding two digit numbers
Adding two digit & one digit numbers
Subtracting two digit numbers
Subtracting two digit & one digit numbers
Adding
100
10 + 10 =
20
100
19 + 8 =
27
100
16 - 12 =
4
100
10 - 5 =
5
100
2 +2 =
4
200
12 + 15 =
27
200
18 + 8 =
26
200
20 - 13
7
200
19 - 4 =
15
200
3 + 3=
6
300

28 + 12 =

40

300
3 + 16 =
19
300
19 - 17
2
300
20 - 6 =
14
300
5 + 5=
10
400

45 + 26 =

71

400
12 + 6
18
400

38 - 19=

19

400
17 - 8 =
9
400
7 + 7 =
14
500
19 + 18=
37
500
16 + 9 =
25
500

69 - 47=

22

500
20 - 9 =
11
500
9 + 9=
18