简便方法:1.5乘8.4加15乘0.06加15乘10%

问题描述:

简便方法:1.5乘8.4加15乘0.06加15乘10%

1.5×8.4+15×0.06+15×10%
=15×0.84+15×0.06+15×0.1
=15×(0.84+0.06+0.1)
=15×0.1
=15