20 × 1 = ?
20
1 × 20 = ?
20
20 × 2 = ?
40
2 × 20 = ?
40
20 × 3 = ?
60
3 × 20 = ?
60
20 × 4 = ?
80
4 × 20 = ?
80
20 × 5 = ?
100
5 × 20 = ?
100
20 × 6 = ?
120
6 × 20 = ?
120
20 × 7 = ?
140
7 × 20 = ?
140
20 × 8 = ?
160
8 × 20 = ?
160
20 × 9 = ?
180
9 × 20 = ?
180
20 × 10 = ?
200
10 × 20 = ?
200
20 × 11 = ?
220
11 × 20 = ?
220
20 × 12 = ?
240
12 × 20 = ?
240