Тема: координатная прямая. Противоположные числа.

№247
найдите х; 1) -х = 15 целых 4/7; 2) -х = -0,8; 3) -х = -4 целых 1/3; 4) -х = 5/6 - 1/9; 5) -х = -7,2.​
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