Сведите дроби: 1) 1/2, 3/4, 4/5, 9/10 к знаменателю 20 2) 3/4, 1/6, 7/18, 8/9 к знаменателю 36

ответ:

1) 1/2 = 10/20, 3/4 = 15/20, 4/5 = 16/20, 9/10 = 18/20;
2) 3/4 = 27/36, 1/6 = 6/36, 7/18 = 14/36, 8/9 = 32/36;
3) 1/2 = 32/64, 2/4 = 32/64, 3/8 = 24/64, 5/32 = 10/64;
4) 1/5 = 20/100, 1/4 = 25/100, 7/25 = 25/100, 63/50 = 126/100.