ЧАСТИНА 1. Вправи 1 - 100 » 51
4 • 4 – 7 = 16 – 7 = 9; 4 • 7 + 5 = 28 + 5 = 33; 4 • 9 + 4 = 36 + 4 = 40; 4 • 2 + 6 = 8 + 6 = 14; 4 • 6 : 3 = 24 : 3 = 8; 4 • 5 – 11 = 20 – 11 = 9; 4 • 8 + 9 = 32 + 9 = 41; 4 • 3 – 12 = 12 – 12 = 0.
4 • 4 – 7 = 16 – 7 = 9; 4 • 7 + 5 = 28 + 5 = 33; 4 • 9 + 4 = 36 + 4 = 40; 4 • 2 + 6 = 8 + 6 = 14; 4 • 6 : 3 = 24 : 3 = 8; 4 • 5 – 11 = 20 – 11 = 9; 4 • 8 + 9 = 32 + 9 = 41; 4 • 3 – 12 = 12 – 12 = 0.