0.625乘以（1又3分之2+3又6分之1）+6分之1除以1又5分之3-8分之5

0.625 X （1又3分之2+3又6分之1）+6分之1除以1又5分之3-8分之5
=5/8 X (1又4/6+3又1/6）+1/6 X 5/8 - 5/8
=5/8 X 4又5/6 + 5/48 - 5/8
=5/8 X 29/6 + 5/48 -5/8
=145/48 + 5/48 - 30/48
=150/48 - 30/48
=120/48
=2又1/2

0.625*（10/6+19/6）+《1/6》/ 《8/5》-5/8
=5/8*〈29/6〉-{8/5}*{5/6}
=2.5