能简便的要用简便方法计算
12÷0.4÷÷9+×??????÷[(-)+(-)]1.8×+1.2×-÷-×315÷(36%+9%)
网友回答
解:(1)12÷0.4÷
=12÷÷
=12××
=40;
(2)÷9+×???
??=×+×?
???
=××2
=;
(3)÷[(-)+(-)]
=÷[+]
=÷
=;
(4)1.8×+1.2×-
=(1.8+1.2-1)×
=;
(5)÷-×
=×2-×
=-
=;
(6)315÷(36%+9%)
=315÷(0.36+0.09)
=315÷0.45
=700;
故