Show:
1 digit subtraction
2 digit - 1 digit subtraction
2 digit subtraction No regrouping
2 digit subtraction with regrouping
100

9-7=

2

100

67-8=

59

100

67-54=

13

100

65-48

17

200

10-3=

7

200

89-9=

80

200

96-23=

73

200

62-17

45

300

8-5=

3

300

75-6=

69

300

53-21=

32

300

83-54

29

400

7-4=

3

400

42-8=

34

400

85-25=

60

400

81-72

9

500

10-0=

10

500

78-9=

69

500

67-54=

13

500

93-59

34