Ответы на вопрос:
1) 1 3/7 * 2 4/5 * 3/4= 10/7 * 14/5 * 3/4 = (10*14*3)/(7*5*4) = 3 2) 3 3/4 * 5/12 * 8/15= 15/4 * 5/12 * 8/15 = (15*5*8)/(4*12*15) = 5/6 3) 1 5/6 * 8 2/11 * 4/9= 11/6 * 90/11 * 4/9 = (11*90*4)/(6*11*9) = 20/3 = 6 2/3 4) 2 1/27 * 3 1/5 * 7 4/11= 55/27 * 16/5 * 81/11 = (55*16*81)/(27*5*11) = 48
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