Частина 2. Номер 707

10 + 2 · 10 = 10 + 20 = 30;

20 · 3 + 30 · 2 = 60 + 60 = 120;

50 – 30 – 10 = 10;

40 : 10 + 5 = 4 + 5 = 9;

50 – (30 – 10) = 50 – 20 = 30;

600 : 60 = 10;

600 : 600 = 1;

600 : 6 = 100;

60 : 6 = 10.