(9.9+0.1-9.9+0.1)÷0.0.1简算
问题描述:
(9.9+0.1-9.9+0.1)÷0.0.1简算
答
(9.9+0.1-9.9+0.1)÷0.01
=(9.9-9.9+0.1+0.1)÷0.01
=0·2÷0.01
=20