<em><span>3</span><span> 4</span><span>\13</span><span>×15</span><span> 3</span><span>\41</span><span>-3</span><span> 4</span><span>\13</span></em><em><span><em>×</em>2</span></em><em><span> 3</span></em><em><span>\41</span></em>=43/13*618/41-43/13*85/41=43/13(618/41-85/41)=43/13*533/41=43*41/41=43
1) 5,6 :0,8= 7 га площадь всего поля
1)1,554:0,148=10,5
2)1,06+10,5=11,56
3)2,5х11,56=28,9
4)3854:500=7,708
5)102-28,9=73,1
6)73,1+7,708=80,808
Ответ:80,808.