12又9分之5减5.75减4又4分之1的简便计算?

问题描述:

12又9分之5减5.75减4又4分之1的简便计算?

12又9分之5减5.75减4又4分之1
=12又9分之5-(5.75+4又4分之1)
=12又9分之5-10
=2又9分之5