8.3*9.9 简算

问题描述:

8.3*9.9 简算

=8.3*10-8.3*0.1

8.3*9.9=8.3*10-8.3*0.1=83-0.83=82.17

8.3*9.9
=8.3*(10-0.1)
=8.3*10-8.3*0.1
=83-0.83
=82.17