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?
答
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