ЧАСТИНА 1. Вправи 1 - 100 » 77
24 : 4 + 3 = 6 + 3 = 9; 16 : 4 – 4 = 4 – 4 = 0; 28 : 4 + 5 = 7 + 5 = 12; 32 : 4 + 20 = 8 + 20 = 28; 8 : 4 + 15 = 2 + 15 = 17; 36 : 4 + 12 = 9 + 12 = 21; 20 : 4 + 7 = 5 + 7 = 12; 4 : 4 + 4 = 1 + 4 = 5.
24 : 4 + 3 = 6 + 3 = 9; 16 : 4 – 4 = 4 – 4 = 0; 28 : 4 + 5 = 7 + 5 = 12; 32 : 4 + 20 = 8 + 20 = 28; 8 : 4 + 15 = 2 + 15 = 17; 36 : 4 + 12 = 9 + 12 = 21; 20 : 4 + 7 = 5 + 7 = 12; 4 : 4 + 4 = 1 + 4 = 5.