Вычислите.1) А) 11/30+7/12, Б) 1/27+5-18, В) 5/21-5/28, Г) 11/18-7/12 2) а)1/8-1/10+1/4, б) 3/20+1/5-1/6, в) 3/4-4/25-7/20, г) 3/7-1/6+5/14.
ЗАПИШИТЕ ОТВЕТ ДРОБЯМИ ПОЖАЛУИСТА!!!
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