求该题简便运算方法：1.56/5.2-5.2*0.05
问题描述：
求该题简便运算方法：1.56/5.2-5.2*0.05
答
1.56/5.2-5.2x0.05=(1.56x20-5.2x5.2)/(5.2x20)
=5.2x(0.3x20-5.2)/(5.2x20)
=(0.3x20-5.2)/20
=(0.3x10-2.6)/10
=0.4/10
=0.04