Show:
Single Digit Addition
Single Digit Subtraction
Single + Double (No Borrowing)
Double + Double (No borrowing)
100
1+1

2

100

3-2

1

100

10+5

15

100
10+10

20

200

3+2

5

200

4-2

2

200

11+8

19

200

14+11

25

300

7+5

12

300

6-2

4

300

80+2

82

300

38+11

49

400

9+7

16

400

9-5

4

400

54+5

59

400

43+46

89

500

9+9

18

500

9-4

5

500

31+8

39

500

11+77

88