4 * 7 O 4 * 9;
0 * 5 O 1 * 4;
2 * 7 O 2 * 6;
20 * 3 O 3 * 20;
6 * 2 O 6 + 6;
12 + 0 O 12 − 0.
4 * 7 < 4 * 9
28 < 36
0 * 5 < 1 * 4
0 < 4
2 * 7 > 2 * 6
14 > 12
20 * 3 = 3 * 20
60 = 60
6 * 2 = 6 + 6
12 = 12
12 + 0 = 12 − 0
12 = 12