0.25*39+0.25 简便计算
问题描述:
0.25*39+0.25 简便计算
答
0.25*39+0.25
=0.25×(39+1)
=0.25×40
=10
0.25*39+0.25 简便计算
0.25*39+0.25
=0.25×(39+1)
=0.25×40
=10