Show:
One digit times one digit
Two digit times one digit
two digit times two digit
100

5x5

25

100

13 x 7

91


100

x * 5=15

x=3

200

8x8

64

200

10 x 8

80

200

4* x=32

x=8

300

6x2

12

300
25 x 4

100

300

5x3

15

400

6x6

36

400

54 x 5

270

400

33x4

132

500

6x4

24

500

47 x 9

423

500

1x333

333