简便运算 (9+9²+9³)×0.01
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/28 18:13:46
简便运算(9+9²+9³)×0.01简便运算(9+9²+9³)×0.01简便运算(9+9²+9³)×0.01(9+9²+9
简便运算 (9+9²+9³)×0.01
简便运算 (9+9²+9³)×0.01
简便运算 (9+9²+9³)×0.01
(9+9²+9³)×0.01
= 9×(1+9+9²)×0.01
= 9×(10+81)×0.01
= 9×(90+1)×0.01
= 9×90×0.01 + 9×1×0.01
= 9×9×0.1 + 9×0.01
= 8.1 + 0.09
= 8.19