Завдання 501 - 600 » 507

Обчисліть: 1) 1 : 13/14 = 14/13 = 11/13; 2) 1 : 15/17 = 17/15 = 12/15; 3) 1 : 9/14 = 14/9 = 15/9; 4) 1 : 17/21 = 21/17 = 14/17; 5) 2 : 4/7 = 2 ∙ 7/4 = 7/2 = 31/2; 6) 3 : 15/16 = 3 ∙ 16/15 = 16/5 = 31/5; 7) 7 : 14/15 = 7 ∙ 15/14 = 15/2 = 71/2; 8) 6 : 18/23 = 6 ∙ 23/18 = 23/3 = 72/3; 9) 3 : 6/7 = 3 ∙ 7/6 = 7/2 = 31/2; 10) 2 : 7/8 = 2 ∙ 8/7 = 16/7 = 22/7; 11) 4 : 10/11 = 4 ∙ 11/10 = 22/5 = 42/5; 12) 14 : 21/22 = 14 ∙ 22/21 = 44/3 = 142/3.