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1X99+99x99

1X99+99x99=99*(1+99)=99*100=9900

2.102x99=2.102x(100-1)=2.102x100-2.102x1=210.2-2.102=208.098希望能帮到你!

(100-1)+(100-1)*(100-1)相同的放一边:(100-1)*(1+100-1)=99*100=9900

99x99x99=(100-1)x99x99=99x99x100-99x99=9900x(100-1)-99x(100-1)=990000-9900-9900+99=990000-10000-10000+200+99=790000+200+99=790299

99+99x99最简单的算法是 99+99x99=99(1+99)=99*100=9900

=4.75*99+4.75*1 =4.75*(99+1) =4.75*100 =475

=99(1+99)=99100=9900

99+1*99=99+99=(100-1)+(100-1)=100+100-1-1=200-2=198 回答完毕~ 有疑问请追问,我一定尽快回复你~ 无疑问请点击【采纳】,同时预祝学习进步~\(^o^)/~ 我不是学霸,叫我赌神~\(^o^)/~~\(^o^)/~~\(^o^)/~~\(^o^)/~

62x99+99x99 =(62+99)*99=161x99=15939

9999199=99x99+99+100=99X(99+1)+100=99x100+100=9900+100=10000

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