8.3*9.9 简算
问题描述:
8.3*9.9 简算
答
=8.3*10-8.3*0.1
答
8.3*9.9=8.3*10-8.3*0.1=83-0.83=82.17
答
8.3*9.9
=8.3*(10-0.1)
=8.3*10-8.3*0.1
=83-0.83
=82.17