41×49-49=(41-1)X49=40X49=1960 我是老师 谢谢采纳
41*49-49=(41-1)*49=40*(50-1)=2000-40=1940
41×49-49=(41-1)×49=40×49=1960
41×49-49=(41-1)X49=40X49=40X(50-1)=40X50-40=2000-40=1960
(41-1)*49=490