6.3+9.9*99+3.6怎么巧算
问题描述:
6.3+9.9*99+3.6怎么巧算
答
6.3+9.9*99+3.6
=(6.3+3.6)+9.9*99
=9.9+9.9*99
=(1+99)*9.9
=100*9.9
=990