Вычислите 1) |-7|-|-3.6|:|1.2| 2) |6 целых 3/7|:|-9|+4 целых 1/3. 3) |-7/2.7|*|-1 целая 1/7|*3. 4) |-2.7|:|-1 целая 4/5|*|1 целая 5/9|

1) | - 7 | - | - 3, 6 | : | 1, 2 | = 7 - 3, 6 : 1, 2 = 7 - 3 = 4;

2) | 6 3/7 | : | - 9 | + 4 1/3 = 45/7 : 9 + 13/3 = (45 * 1) / (7 * 9) + 13/3 = 5/7 + 13/3 = (15 + 91) / 21 = 106/21 = 5 1/21;

3) | - 7/2, 7 | * | - 1 1/7 | * 3 = 7/2, 7 * 1 1/7 * 3 = 7 : 21/10 * 8/7 * 3 = (7 * 10 * 8 * 3) / (1 * 21 * 7) = 80/7 = 11 3/7;

4) | - 2, 7 | : | - 1 4/5 | * | 1 5/9| = 27/10 : 9/5 * 14/9 = (27 * 5 * 14) / (10 * 9 * 9) = (3 * 5 * 14) / (10 * 9) = 14 / (2 * 3) = 7/3 = 2 1/3.