Răspunsuri

2014-03-06T13:33:00+02:00
Prin segmente si efectiv
efectiv 
857-44=813
prin segmente
|----|--------------------------|   857
|----|  44
2014-03-06T13:44:45+02:00
857- 44=813 
857- 44 = 800 + 57 - 44 = 800 +13 = 813