Răspunsuri

2014-11-19T17:38:24+02:00
2001·2000-1999·2000-2·1999=
=2000·(2001-1999)-3998=
=2000·2-3998=
=4000-3998=
=2
2014-11-19T17:39:43+02:00
2001*2000=4002000               1999*2000= 3998000               2*1999= 3998             4002000-3998000-3998 =2