9999乘8888除1111的简便运算?

问题描述:

9999乘8888除1111的简便运算?

9999*8888/1111
=1111*(9*8)/1111
=9*8
=72

9999 × 8888 ÷ 1111
= (10000-1) × (8888 ÷ 1111)
= (10000-1) × 8
= 800000-8
= 799992

=9999×(8888÷1111)
=(10000-1)×8
=10000×8-1×8
=80000-8
=79992