Частина 1. Номер 146

21 + 39 = 60;

92 – 68 = 24;

42 + 29 = 71;

45 + 27 = 72;

89 – 77 = 12;

3 · 5 = 15;

3 · 9 = 27;

3 · 7 = 21;

2 · 8 = 16;

2 · 5 = 10.