ЧАСТИНА 1. Вправи 1 - 100 » 23

2 • 7 – 5 = 14 – 5 = 9; 3 • 8 + 26 = 24 + 26 = 50; 18 : 3 + 15 = 6 + 15 = 21; 18 : 2 : 9 = 9 : 9 = 1; 1 • (6 • 0) = 1 • 0 = 0; 0 : (6 + 6) = 0 : 12 = 0; 5 : (12 – 7) = 5 : 5 = 1; 0 • (6 + 6) = 0 • 12 = 0.