(9+9²+9³)乘0.01的简便运算

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(9+9²+9³)乘0.01的简便运算
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(9+9²+9³)乘0.01的简便运算
(9+9²+9³)乘0.01的简便运算

(9+9²+9³)乘0.01的简便运算
[9*(1+9+81)]*0.01
=8.19

(9+9²+9³)×0.01
=(9×1+9×9+9×9×9)×0.01
=9×(1+9+9×9)×0.01
=9×91×0.01
=819×0.01
=8.19