помогите пж срочно пж пж

486
10 3/5 - 8 1/6 = 10 18/30 - 8 5/30 =2 13/30

487
35 4/15 - 29 1/5 = 35 4/15 -29 3/15 = 6 1/15

488
28 5/6 + 2 2/3 = 28 5/6 + 2 4/6 = 30 9/6 = 31 3/6 = 31 1/2
28 5/6 - 2 2/3 = 28 5/6 - 2 4/6 = 26 1/6