0.65*9.9如何用简便方法计算
问题描述:
0.65*9.9如何用简便方法计算
答
0.65(10-0.1)
=6.5-0.065
=6.435
0.65*9.9如何用简便方法计算
0.65(10-0.1)
=6.5-0.065
=6.435