10.1*0.99=(10+0.1)*0.99=10*0.99+0.1*0.99=9.9+0.099=9.999你好本题已解答,如果满意请点右下角“采纳答案”.

10.1x0.99=(10+0.1)*0.99=10*0.99+0.1*0.99=9.9+0.099=9.999

=(10+0.1)*(1--0.01) =10--0.1+0.1--0.001 =

10.1x0.99=(10+0.1)*0.99=10*0.99+0.1*0.99=9.9+0.099=9.999

10.1X0.99 =(10+0.1)X0.99=9.9+0.099=9.999

10.1X0.99=10.1X(1-0.01)=10.1-0.101=9.999

10.1*0.99=10.1*9.9/10=[(10+0.1)*(10-0.1)]/10 平方差公式=(10*10-0.1*0.1)/10=(100-0.01)/10=99.99/10=9.999

(10+0.1)(1-0.01)=10*1-10*0.01+0.1*1-0.1*0.01=10-0.1+0.1-0.001=9.999

10.1x0.99=10.1x1-10.1x0.01=10.1-0.101=9.999

10.1*0.99=(10+0.1)*(10-0.1) =10-0.1 =100-0.01 =99.99