Ответы на вопрос:
А)124: 3=124: 3 (несократимая дробь) б)6: 20=3: 10 в)12,3: 3=4,1: 1 г)9,1: 0,07=910: 7=130: 1 д)0,25: 0,55=25: 55=5: 11
((3/8 - 5/6) : 3/4 + (-3/8 - 7/20) : 1 9/20) * 1/50 = - 1/45 1) 3/8 - 5/6 = 9/24 - 20/24 = - 11/24 2) - 11/24 : 3/4 = (-11/24) * 4/3 = - (11*1)/(6*3) = - 11/18 3) - 3/8 - 7/20 = - 15/40 - 14/40 = - 29/40 4) - 29/40 : 1 9/20 = - 29/40 : 29/20 = - 29/40 * 20/29 = - 20/40 = - 1/2 5) - 11/18 + (-1/2) = - 11/18 - 9/18 = - 20/18 6) - 20/18 * 1/50 = - (2*1)/(18*5) = - 2/90 = - 1/45
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