7 * 8
5 * 9
8 * 8
49 : 7 * 9
72 : 8 * 3
56 : 7 * 2
16 * 4 + 6 * 3
13 * 4 + 3 * 5
4 * 5 + 4 * 9
46 − 64 : 8
50 − 24 : 3
24 − 40 : 5
7 * 8 = 56;
5 * 9 = 45;
8 * 8 = 64;
49 : 7 * 9 = 7 * 9 = 63;
72 : 8 * 3 = 9 * 3 = 27;
56 : 7 * 2 = 8 * 2 = 16;
16 * 4 + 6 * 3 = (10 + 6) * 4 + 6 * 3 = 40 + 24 + 18 = 64 + 18 = 82;
13 * 4 + 3 * 5 = (10 + 3) * 4 + 3 * 5 = 40 + 12 + 15 = 52 + 15 = 67;
4 * 5 + 4 * 9 = 20 + 36 = 56;
46 − 64 : 8 = 46 − 8 = 38;
50 − 24 : 3 = 50 − 8 = 42;
24 − 40 : 5 = 24 − 8 = 16.