555125-355126+355的简便运算

分类: 作业答案 • 2021-12-19 11:36:54

问题描述：

555*125-355*126+355的简便运算

答

=555*125-355*126+355*1
=555*125-355*(126-1)
=555*125-355*125
=(555-355)*125
=200*125
=25000

答

555*125-355*126+355
=555*125-355*(125+1)+355
=555*125-355*125-1*355+355
=(555-355)*125
=200*125
=50000

答

555*125-355*126+355
=555*125-355*(126-1)
=555*125-355*125
=(555-355)*125
=200*125
=25000

555*125-355*126+355的简便运算