Выполните вычитание: 1) 4 3/16 - 5/8; 2) 6 4/9 - 3 6/7; 3) 10 11/24 - 8 19/36; 4) 9 1/6 - 5 3/4.

1) 4 3/16 - 5/8=4 3/16 - 10/16 = 3 19/16 - 10/16 = 3 9/16; 2) 6 4/9 - 3 6/7=3 4/9-6/7=3 28/63-54/63=2 91/63-54/63=2 37/63; 3) 10 11/24 - 8 19/36=2 11/24-19/36=2 33/72-38/72=1 105/72-38/72=1 67/72; 4) 9 1/6 - 5 3/4 = 4 1/6 - 3/4=4 2/12 - 9/12=3 14/12-9/12=3 5/12.