Частина 1. Номер 645

27 : 9 · 3 = 3 · 3 = 9;

8 · 8 – 59 = 64 – 59 = 5;

6 · 6 : 4 = 36 : 4 = 9;

3 · 8 : 6 = 24 : 6 = 4;

6 · 7 – 42 = 42 – 42 = 0;

4 · 5 – 19 = 20 – 19 = 1;

2 · 9 : 6 = 18 : 6 = 3;

(12 + 18) : 6 = 30 : 6 = 5;

2 · 8 : 4 = 16 : 4 = 4;

6 · 8 – 46 = 48 – 46 = 2;

4 · 8 – 27 = 32 – 27 = 5;

56 : 7 : 2 = 8 : 2 = 4.