Помогите решить ! 1) 5 целых + (- 2 целых 1/2) 2) - 2 целых : 5 целых 1/3 - 7/10: 1целую 1/15 3) 2 целых 1 /5 * 1/3 + (-3/10):4целых 1/2 4) 3/7-(1целая1/4 -1целая1/8*2/9).
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