Show:
Subtracting 1 digit
Multiply 4's
Subtracting 1 and 2 digit
Multiply 6's
Bonus
100

7-8

1

100

4x2

8

100

12-3

9

100

6x2

12

100

75-74

1

200

5-3

2

200

4x6

24

200

45-5

40

200

6x5

30

200

8x8

64

300

8-4

4

300

4x8

32

300

39-8

31

300

6x4

24

300

9x10

90

400

9-7

2

400

4x10

40

400

78-5

73

400

6x7

42

400

175-82

93

500

9-4

5

500

4x12

48

500

76-5

71

500

6x9

54

500

11x12

132