38.5减5.38加61.5减4.62的简便计算
问题描述：
38.5减5.38加61.5减4.62的简便计算
答
38.5-5.38+61.5-4.62
=（38.5+61.5）-(5.38-4.62)
=100-10
=90
用交换律与结合律，很简单的
答
=（38.5+61.5)-(5.38+4.62)
=100-10
=90
答
(38.5+61.5)-(5.38+4.62)=100-10=90
看懂吗？不明白可以继续问
答
38.5-5.38+61.5-4.62＝（38.5+61.5）-（5.38+4.62）＝100-10＝90
答
38.5减5.38加61.5减4.62
=（38.5+61.5）-（5.38+4.62）
=100-10
=90