Show:
0s, 1s, 2s
5s and 10s
3s and 4s
6s and 7s
8s and 9s
100

0x1=

0

100

5x4=

20

100

3x0=

0

100

6x2=

12

100

8x1=

8
200

1x2=

2

200

5x9=

45

200

3x3=

9

200

6x10=

60


200

8x5=

40


300

2x4=

8

300

10x3=

30


300

4x3=

12


300

6x6=

36

300

8x8=

64


400

2x7=

14

400

10x7=

70


400

4x6=

24


400

7x6=

42

400

9x8=

72

500

2x9=

18
500

10x10

100

500

4x9=

36

500

7x7=

49

500

9x9=

81