Show:
x3
x4
x6
x7
x8
100

5 x 3

What is 15

100
4 x 2
What is 8
100

6 x 2

What is 12

100
3 x 7
What is 21
100

8 x 2

What is 16

200
3 x 3
What is 9
200
4 x 4
What is 16
200
6 x 8
What is 48
200

5 × 7

What is 35

200
8 x 7
What is 56
300
3 x 4
What is 12
300

4 x 5

What is 20

300
6 x 4
What is 24
300
7 x 7
What is 49
300
8 x 8
What is 64
400
6 x 3
What is 18
400
4 x 9
What is 36
400
6 x 6
What is 36
400
7 x 6
What is 42
400
8 x 4
What is 32
500
8 x 3
What is 24
500
4 x 7
What is 28
500
6 x 9
What is 54
500

7 x9

What is 63

500

8 x 9

What is 72