0.63÷0.1+0.9怎么简便计算
问题描述：
0.63÷0.1+0.9怎么简便计算
答
=6.3÷1+0.9
=6.3+0.9
=7.2
0.63÷0.1+0.9怎么简便计算
=6.3÷1+0.9
=6.3+0.9
=7.2