0.9×9.9×99.9×999.9得0.9×9.9×99.9×999.9=我当然会用,不过要求用简便算法,要不然我问什吗啊

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0.9×9.9×99.9×999.9得0.9×9.9×99.9×999.9=我当然会用,不过要求用简便算法,要不然我问什吗啊

0.9×9.9×99.9×999.9得0.9×9.9×99.9×999.9=我当然会用,不过要求用简便算法,要不然我问什吗啊
0.9×9.9×99.9×999.9得
0.9×9.9×99.9×999.9=
我当然会用,不过要求用简便算法,要不然我问什吗啊

0.9×9.9×99.9×999.9得0.9×9.9×99.9×999.9=我当然会用,不过要求用简便算法,要不然我问什吗啊
0.9×9.9×99.9×999.9
=0.9×(10-0.1)×(100-0.1)×(1000-0.1)
=(9-0.9)×(100-0.1)×(1000-0.1)
=8.1×(100-0.1)×(1000-0.1)
=(810-0.81)×(1000-0.1)
=809.19×(1000-0.1)
=809190-80.919
=809109.081

0.9×9.9×99.9×999.9得0.9×9.9×99.9×999.9=我当然会用,不过要求用简便算法,要不然我问什吗啊 ln几得0 0型血能得血溶病吗 0的0次幂得1还是得0? 9除以0得几? 根号下0得多少 只有相反数相加得0, 无限 没有 得得得得得得得得得得得得得得得得 甲乙丙三人赛跑,第一名得a分,第二名得b分,第三名得c分（0 的得得得得得得得得得得 积分过程 呃呃呃额额的得得得得得得 足球比赛胜一场得3分,平一场得一分,输一场得0分.可能有几种不同的积分 足球比赛胜一场得3分,平一场得一分,输一场得0分.可能有几种不同的积分 0除以任何数得0对吗? 0除以任何数都得0 0乘以任何数都得0 0的0次幂得多少 0除任何数都得0,