23.94-3.87+6.06-6.13 能简便的要简算
问题描述：
23.94-3.87+6.06-6.13 能简便的要简算
答
23.94-3.87+6.06-6.13
=23.94+6.06-(3.87+6.13)
=30-10
=20
答
=(23.94+6.06)-(3.87+6.13)
=30-10
=20