ответ: 1. 5 2/3 + 1 1/3 = 6 3/3 = 7;
2. 5 2/3 - 1 1/3 = 4 1/3;
3. 1) 32 7/10 + 17 3/10 = 49 10/10 = 50(кг)
2) 50 + 9/10 = 50 9/10
ответ: 1. 5 2/3 + 1 1/3 = 6 3/3 = 7;
2. 5 2/3 - 1 1/3 = 4 1/3;
3. 1) 32 7/10 + 17 3/10 = 49 10/10 = 50(кг)
2) 50 + 9/10 = 50 9/10