Вычисли.
20 * 4;
30 * 2;
20 * 3;
50 * 2;
20 * 4 − 16;
40 * 2 + 9;
30 * 3 − 47;
20 * 2 + 54;
6 * 3 + 64;
2 * 8 + 27;
18 : 9 + 31;
12 : 4 + 88.
20 * 4 = 80;
30 * 2 = 60;
20 * 3 = 60;
50 * 2 = 100;
20 * 4 − 16 = 80 − 16 = 64;
40 * 2 + 9 = 80 + 9 = 89;
30 * 3 − 47 = 90 − 47 = 43;
20 * 2 + 54 = 40 + 54 = 94;
6 * 3 + 64 = 18 + 64 = 82;
2 * 8 + 27 = 16 + 27 = 43;
18 : 9 + 31 = 2 + 31 = 33;
12 : 4 + 88 = 3 + 88 = 91.