35.1*9.9怎么简算?
问题描述:
35.1*9.9怎么简算?
答
1.01*9.9
=1.01*(10-0.1)
=1.01*10-1.01*0.1
=10.1-0.101
=9.999
或者:
1.01*9.9
=(1+0.01)*9.9
=9.9+0.01*9.9
=9.9+0.099
=9.999.
答
把他变成35.1乘以10再减去35.1乘以0.1就可以了
答
35.1×9.9=35.1×(10-0.1)
=35.1×10-35.1×0.1
=351-3.51
=347.49