999*998+1998简便计算
问题描述:
999*998+1998简便计算
答
999000
答
999*998+1998
=(1000-1)*998+1998
=1000*998-998+1000+998
=998000+1000
=999000
答
999*998+1998
=(1000-1)*998+1998=1000*998-998+1000+998=998000+1000=999000
答
原式=1000*998-998+1998
=998000+1000
=999000
答
999*998+1998
=999(998+2)
=999000