题目内容

锐式计算,能简算的要简算。
(1)×14÷ (2)+× (3)(+)÷
(4)÷(+ (5)9÷3 (6)×-
(7)45×+15× (8)24×(+ (9)(-)×24
(10)2008× (11)×+× (12)×370%+630%×+440%
(1)原式=÷
                =2
(2)原式=+
                =1
(3)原式=÷
                =
(4)原式=÷
                =
(5)原式=÷3
                 =3
(6)原式=-
                =
(7)原式=(45+15)×
                =60×
                = 45
(8)原式=24×+24×
                =2+3
                =5
(9)原式=×24-×24
                =18-4
                =14
(10)原式=(2007+1)×
                  =2006
(11)原式=+
                  =
(12)原式=×(370%+630%)+440%
                 =2+440%
                 =640%
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