1. 35/42 = 5/6; 70/84 = 5/6; 84/56 = 3/2 = 1 1/2
2. а) 3/16 = 9/48, 5/24 = 10/48 → 3/16 < 5/24; б) 13/330 = 26/660, 9/220 = 27/660 → 13/330 < 9/220
3. а) 7/8 − 5/6 = 21/24 − 20/24 = 1/24 б) 13/16 + 7/24 = 39/48 + 14/48 = 53/48 = 1 5/48 в) 19/20 − 5/12 + 9/5 = 57/60 − 25/60 + 108/60 = 140/60 = 7/3 = 2 1/3
4. Во 2-й день: 4/9 − 1/12 = 13/36. За два дня: 4/9 + 13/36 = 16/36 + 13/36 = 29/36 ящика
5. 3/7 = 9/21, 4/7 = 12/21 → 10/21 и 11/21 (подходят, например, и 13/28, 15/28)
