简便方法0.36*7.4+0.72*1.3
问题描述：
简便方法0.36*7.4+0.72*1.3
答
0.36*7.4+0.72*1.3
=0.36*7.4+0.36*2*1.3
=0.36*7.4+0.36*2.6
=0.36*(7.4+2.6)
=0.36*10
=3.6