41*101
=41*(100+1)
=41*100+41*1
=4100+41
=4141
1252-198
=1252-(200-2)
=1252-200+2
=1052+2
=1054
1375+450/18*25
=1375+450/(2*9*5*5)
=1375+450/[(2*5)*9*5)]
=1375+450/(10*45)
=1375+450/450
=1375+1
=1376
如何简便计算?（要详细过程）41*101 1252-198 1375+450/18*25
41*101
=41*(100+1)
=41*100+41*1
=4100+41
=4141
1252-198
=1252-(200-2)
=1252-200+2
=1052+2
=1054
1375+450/18*25
=1375+450/(2*9*5*5)
=1375+450/[(2*5)*9*5)]
=1375+450/(10*45)
=1375+450/450
=1375+1
=1376