7.0.4 99的简便方法
4.7乘以0.99的简便方法
简便计算方法如下:
4.7*0.99
=4.7*(1-0.01)
=4.7*1-4.7*0.01
=4.7-0.047
=4.653
7-0.7
=(1-0.01)×4.7
=1×4.7-0.01×40.99×4.7
=4.047
=4
4.7*0.99
=4.7*(1-0.01)
=4.7*1-4.7*0.01
=4.7-0.047
=4.653
4.7X0.99
=4.7X1-4.7X0.01
=4.7-0.047
=4.653