Задание 1. Найдите значение выражения

Привет! Давай решим примеры с дробями. 1) 3/4 * 6/5 = 18/20 = 9/10 = 0,9 2) 21/5 : 7/1 = 21/5 * 1/7 = 3/5 = 0,6 3) 3/5 * 25/4 = 75/20 = 15/4 = 3,75 4) 9/5 : 3/1 = 9/5 * 1/3 = 3/5 = 0,6 5) 5/3 : 2/1 = 5/3 * 1/2 = 5/6 6) 7/5 * 12/35 = 1/5 * 12/5 = 12/25 = 0,48 7) 12/5 : 15/2 = 12/5 * 2/15 = 4/5 * 2/5 = 8/25 = 0,32 8) 6/5 : 4/11 = 6/5 * 11/4 = 3/5 * 11/2 = 33/10 = 3,3 9) 3/5 : 4/35 = 3/5 * 35/4 = 3/1 * 7/4 = 21/4 = 5,25 10) 15/4 : 3/7 = 15/4 * 7/3 = 5/4 * 7/1 = 35/4 = 8,75 11) 21/2 : 3/5 = 21/2 * 5/3 = 7/2 * 5/1 = 35/2 = 17,5 12) 14/5 : 7/1 = 14/5 * 1/7 = 2/5 = 0,4 13) 1/4 - 3/25 = 25/100 - 12/100 = 13/100 = 0,13 14) 1/5 - 27/50 = 10/50 - 27/50 = -17/50 = -0,34 15) 1/2 - 9/25 = 25/50 - 18/50 = 7/50 = 0,14 16) 1/5 - 3/4 = 4/20 - 15/20 = -11/20 = -0,55 17) 1/2 - 13/50 = 25/50 - 13/50 = 12/50 = 6/25 = 0,24 18) 1/10 - 23/20 = 2/20 - 23/20 = -21/20 = -1,05 19) 14/25 + 3/2 = 28/50 + 75/50 = 103/50 = 2,06 20) 9/4 + 8/5 = 45/20 + 32/20 = 77/20 = 3,85 21) 11/5 + 13/4 = 44/20 + 65/20 = 109/20 = 5,45 22) 1/10 + 21/50 = 5/50 + 21/50 = 26/50 = 0,52 23) 3/4 + 7/25 = 75/100 + 28/100 = 103/100 = 1,03 24) 4/25 + 15/4 = 16/100 + 375/100 = 391/100 = 3,91