1 * 3;
3 : 3;
2 : 2;
5 * 3;
3 * 8;
6 * 3;
21 : 7;
27 : 3;
24 : 8;
18 : 6;
12 : 4;
15 : 5;
(45 + 35) : 10;
10 * (21 − 16);
(62 + 18) : 8.
1 * 3 = 3;
3 : 3 = 1;
2 : 2 = 1;
5 * 3 = 15;
3 * 8 = 24;
6 * 3 = 18;
21 : 7 = 3;
27 : 3 = 9;
24 : 8 = 3;
18 : 6 = 3;
12 : 4 = 3;
15 : 5 = 3;
(45 + 35) : 10 = 80 : 10 = 8;
10 * (21 − 16) = 10 * 5 = 50;
(62 + 18) : 8 = 80 : 8 = 10.