8.3*8.3*9的简便运算

问题描述:

8.3*8.3*9的简便运算

8.3*8.3*9
=8.3*8.3*(10-1)
=8.3*(83-8.3)
=8.3*74.7
=(10-1.7)*74.7
=747-126.99
=621.01非常感谢!