1. 5 7/8 - 2 2/3 +4 5/6 =8 1/24
а. 5 7/8 - 2 2/3= 3 (7/8 - 2/3)= 3 5/24
б. 3 5/24 + 4 5/6= 7 ( 5/24 +5/6)= 8 1/24
2. 8 5/7 +4 3/4 -3 5/8 = 9 21/28
а. 8 5/7 + 4 3/4 = 12(5/7 + 3/4)= 13 13/28
б. 13 13/28 -3 5/8= 10 (13/28-5/8)= 9 21/28
3. (31 - 14 7/15) - (27 2/3 - 19 3/4) = 8 37/60
а. 31 - 14 7/15 =16 (15/15 -7/15)=16 8/15
б. 27 2/3 - 19 3/4= 8 (2/3 - 3/4)= 7 11/12
в. 16 8/15 - 7 11/12= 9 (8/15-11/12)= 8 37/60
4. (43 7/8 - 5 2/5) - 12 8/12=26 17/120
а. 43 7/8 - 5 2/5 = 38 (7/8 -2/5)= 38 19/40
б. 38 19/40 - 12 8/12= 26 (19/40 - 8/12) = =26 17/120
1. день прошли - 14 5/24 км.
2. день 14 5/24 - 5 8/9 = 8 23/72 км.
3.день 14 5/24 +3 5/12=17 15/24=17 5/7 км.