1.08-0.8怎么简便计算 (0.18+0.9)/9怎么简便计算 6.3/0.0.怎么简便计算 4.9*9+4.9怎么简便计算

问题描述:

1.08-0.8怎么简便计算 (0.18+0.9)/9怎么简便计算 6.3/0.0.怎么简便计算 4.9*9+4.9怎么简便计算
6.3/0.01

1.08-0.8=1.08-1+0.2=0.28
(0.18+0.9)÷9
=0.18÷9+0.9÷9
=0.02+0.1
=0.12
6.3÷0.01
=(6.3×100)÷(0.01×100)
=630÷1
=630
4.9×9+4.9
=4.9×(9+1)
=4.9×10
=492.5*4*0.8*1.25呢?