Дроби к общему знаменателю 1/51 и 1/68,5/36 и 7/54,9/35 и 11/42,4/49 и 5/63,15/98 и 13/72. напишите ответы

Пошаговое объяснение:

1) 1/51 и 1/68 = 1/(3*17) и 1/(4*17) = 4/(3*4*17) и 3/(3*4*17) = 4/204 и 3/204

2) 5/36 и 7/54 = 5/(2*18) и 7/(3*18) = 15/(2*3*18) и 14/(2*3*18) = 15/108 и 14/108

3) 9/35 и 11/42 = 9/(5*7) и 11/(6*7) = (9*6)/(5*7*6) и (11*5)/(6*7*5) = 54/210 и 55/210

4) 4/49 и 5/63 = 4/(7*7) и 5/(7*9) = (4*9)/(7*7*9) и (5*7)/(7*7*9) = 36/441 и 35/441

5) 15/98 и 13/72 = 15/(2*7*7) и 13/(2*4*9) =

= (15*4*9)/(2*7*7*4*9) и (13*7*7)/(2*7*7*4*9) = 540/3528 и 637/3528