9 * 4;
8 * 4;
7 * 4;
32 : 4;
14 : 7;
24 : 6;
20 : 4;
36 : 9;
28 : 4;
42 + (20 − 8);
50 − (17 − 9);
70 − (38 + 7).
9 * 4 = 36;
8 * 4 = 32;
7 * 4 = 28;
32 : 4 = 8;
14 : 7 = 2;
24 : 6 = 4;
20 : 4 = 5;
36 : 9 = 4;
28 : 4 = 7;
42 + (20 − 8) = 42 + 12 = 54;
50 − (17 − 9) = 50 − 8 = 42;
70 − (38 + 7) = 70 − 45 = 25.