Частина 1. Номер 664
9 · 5 + 5 = 45 + 5 = 50;
9 · 7 + 7 = 63 + 7 = 70;
9 · 8 + 8 = 72 + 8 = 80;
9 · 9 + 9 = 81 + 9 = 90;
9 · 4 + 16 = 36 + 16 = 52;
9 · 2 + 27 = 18 + 27 = 45;
9 · 3 + 42 = 27 + 42 = 69;
9 · 6 + 38 = 54 + 38 = 92.
9 · 5 + 5 = 45 + 5 = 50;
9 · 7 + 7 = 63 + 7 = 70;
9 · 8 + 8 = 72 + 8 = 80;
9 · 9 + 9 = 81 + 9 = 90;
9 · 4 + 16 = 36 + 16 = 52;
9 · 2 + 27 = 18 + 27 = 45;
9 · 3 + 42 = 27 + 42 = 69;
9 · 6 + 38 = 54 + 38 = 92.