3.2*0.2*6.5有简便计算吗
问题描述：
3.2*0.2*6.5有简便计算吗
5.21*2.6-4.07有简便计算吗
答
3.2*0.2*6.5
=3.2*0.1*2*6.5
=0.32*13
=4.16
5.21*2.6-4.07
=13.546-4.07
=9.476