8.13×9.9的简便运算。。

2024-11-26 08:23:29
推荐回答(2个)
回答1:

8.13×9.9=8.13×(10-0.1)=81.3-0.813=80.487

回答2:

8.13×9.9
=8.13×(10-0.1)
=8.13×10-8.13×0.1
=81.3-0.813
=80.487