Приведите 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; 3) 1/2, 2/4, 3/8,

1) 1/2 * 10/10 = 10/20, 3/4 * 5/5 = 15/20, 4/5 * 4/4 = 16/20, 9/10 * 2/2 = 18/20n
2) 3/4 * 9/9 = 27/36, 1/6 * 6/6 = 6/36, 7/18 * 2/2 = 14/36, 8/9 * 4/4 = 32/36;n
3) 1/2 * 32/32 = 32/64, 2/4 * 16/16 = 32/64, 3/8 * 8/8 = 24/64, 5/32 * 2/2 = 10/64;n
4) 1/5 * 20/20 = 20/100, 1/4 * 25/25 =25/100, 7/25 * 4/4 =28/100, 63/50 * 2/2 =126100.