Решить примеры 1)22/21-21/22= 2) 8ц 3/4-4ц= 3)1 ц 1/2-1/3= 4)10целых 5/8-3 целых 5/6=

1) 22/21 - 21/22 = (22*22 - 21*21)  / 21*22=43/462
2) 8  3/4 - 4 = 4 3/4
3) 1 1/2 -1/3 = (3*3 - 1*2) / 6 = 7/6 = 1 1/6
4) 10 5/8 - 3 5/6 = (85 * 6 - 23*8 ) /48 = (510-184) /48 =
= 326/48 = 163 /24 = 6  19/24