简算:2.46*9.9+0.246
问题描述:
简算:2.46*9.9+0.246
急
答
2.46*9.9+0.246
=0.246*10*9.9+0.246
=0.246*99+0.246
=0.246*(99+1)
=0.246*100
=24.6