两种方法
第一种:从左到右,先乘除后加减
2008 * 11/75 + 11/15 / 1/12
=22088/75 + 44/5
=22088/75 + 660/75
=22748/75
第二种:简便运算
2008 * 11/75 + 11/15 / 1/12
=2008 * 11/75 + 11/15 * 12
=2008 * 11/75 + 11/75 * 5 * 12
=2008 * 11/75 + 11/75 * 60
=(2008 + 60) * 11/75
=2068 * 11/75
=22748/75