<span>k+12705/1221=105 </span>
<span>k+12705=105*1221</span>
<span>k+12705=128205</span>
<span>k=128205-12705</span>
<span>k=115500</span>
1) 8856-8.849=207
2) 308•207=63.756
3) 54.600:6=9100
4) 81.308-63.756=17.552
5)17.552+9.100=26652
1/2, 2/3, 3/4, 5/6, 4/5, 6/7, 8/9, 7/8.
..........3333............................
60 км наверное, 12 умножить на 5