59. Выполните умножение или деление:

Решение примеров: 1 столбец: 2/3 * 9/14 = (2 * 9) / (3 * 14) = 18 / 42 = 3/7 4/5 * 15/16 = (4 * 15) / (5 * 16) = 60 / 80 = 3/4 3/7 * 8/21 = (3 * 8) / (7 * 21) = 24 / 147 = 8/49 12/23 * 1 = 12/23 17/19 * 0 = 0 2/5 * 4/5 = 8/25 3/7 : 9/14 = 3/7 * 14/9 = (3 * 14) / (7 * 9) = 42 / 63 = 2/3 5/8 : 1/40 = 5/8 * 40/1 = (5 * 40) / 8 = 5 * 5 = 25 3/17 : 2/51 = 3/17 * 51/2 = (3 * 51) / (17 * 2) = (3 * 3) / 2 = 9/2 = 4,5 2/11 : 4/77 = 2/11 * 77/4 = (2 * 77) / (11 * 4) = 14 / 4 = 3,5 3/4 * 2 = 6/4 = 1,5 2 столбец: 12/13 : 7/13 = 12/13 * 13/7 = 12/7 = 1 5/7 33/34 : 1/34 = 33/34 * 34/1 = 33 3 * 5 1/3 = 3 * 16/3 = 16 64/76 : 16/19 = 64/76 * 19/16 = (64/16) * (19/76) = 4 * 1/4 = 1 12/25 * 5/16 = (12 * 5) / (25 * 16) = 60 / 400 = 3/20 12/19 * 1/24 = 12 / (19 * 24) = 1 / (19 * 2) = 1/38 8/13 * 13/8 = 1 23/72 * 72/23 = 1 3/8 : 5/7 = 3/8 * 7/5 = 21/40 5/16 : 6/8 = 5/16 * 8/6 = 5 / (2 * 6) = 5/12 0 : 23/45 = 0 3 столбец: 3 1/4 * 4 = 13/4 * 4 = 13 10 * 5 2/5 = 10 * 27/5 = 2 * 27 = 54 0 : 2 1/7 = 0 3 5/16 * 1 = 3 5/16 2 17/18 : 1 = 2 17/18 4 1/2 : 6 2/3 = 9/2 : 20/3 = 9/2 * 3/20 = 27/40 1 51/93 : 1 5/31 = 144/93 : 36/31 = 144/93 * 31/36 = (144/36) * (31/93) = 4 * 1/3 = 4/3 = 1 1/3 2 1/2 * 3 1/15 = 5/2 * 46/15 = (1 * 23) / (1 * 3) = 23/3 = 7 2/3 4/9 * 3 3/4 = 4/9 * 15/4 = 15/9 = 5/3 = 1 2/3 1 6/7 * 3 5/10 = 13/7 * 35/10 = 13/7 * 7/2 = 13/2 = 6,5 8 : 4/7 = 8 * 7/4 = 2 * 7 = 14