作业帮98+198+1998+16 用简便计算怎么做
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98+198+1998+16 用简便计算怎么做
98+198+1998+16 用简便计算怎么做
98+198+1998+16 用简便计算怎么做
98+198+1998+16
=100+200+1000+(16-6 )
=1310
98+198+1998+2+2+2+10
=100+200+1000+10
=1310
=(100-2)+(200-2)+(2000-2)+6+10
=2000+200+100+10
=2310
98+2+198+2+1998+2+(16-6)
98+198+1998+16
=(98+2)+(198+2)+(1998+2)+(16+4)-(2+2+2+4)
=100+200+2000+20-10
=2320-10
=2310
很简单嘛~~ 呵呵....
98+198+1998+16
=98+198+1998+(10+2+2+2)
=(98+2)+(198+2)+(1998+2)+10
=100+200+2000+10
=2310