Прямая ab проходит через середину отрезка кl-точку o

Разделить 5:16  - это значит, как - бы разделить поровну 84 конфеты на 5 девочек и 16 мальчиков поровну. сначала считаем сколько всего детей
5+16 = 21 , значит 84 конфеты делим на 21 часть
84:21 = 4 конфеты - это 1 часть, тогда 
5*4 = 20 конфет в 5 частях
5*16 = 64 -  в 16 частях, то есть 
84 разделить в отношении 5:16  = 20:64
2) 8:13  8+13 = 21; 84:21 = 4,  8*4 =32,  13*4 = 52  , значит 8:13 = 32:52
3)11:10.  11+10 = 21, 84:21 = 4,  11*4 = 44,  10*4 = 40, значит 11:10 = 44=40
4) 2+19=21,  84:21=4,   2*4 =8,   19*4 =76   2:19=8:76
5) 17+4 =21,  84:21 = 4,  17*4 = 68,  4*4 =16,  17:4 = 68:16
6) 1+6 = 7,  84:7 = 12,  1*12 =12,  6*12 = 72,  1:6 = 12:72

I am grateful for this year after all!) The more I thank him so that I had more friends, acquaintances, began to devote more time to the parents, for me it was the best year of his most vivid impressions!) My friend appeared the dog with which we often played in the summer!) I tried to be Yeshe better and improve ourselves!) I like it could be difficult, but I tried!) I bragodaren everything and for everything they have done for me and was carried out at the time!) me in the next year will be even better !)