计算:(1) (6 5 11 -5 11 15 )÷[2 2 7 +(12-8 2 3 )÷1.4] (2
计算:(1)(6511-51115)÷[227+(12-823)÷1.4](2)[75%-(423-349)×0.25]÷[(256+113)÷212-1415]....
计算:(1) (6 5 11 -5 11 15 )÷[2 2 7 +(12-8 2 3 )÷1.4] (2) [75%-(4 2 3 -3 4 9 )×0.25]÷[(2 5 6 +1 1 3 )÷2 1 2 -1 4 15 ] .
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(1) (6
=
=
=
=
(2) [75%-(4
=[75%-1
=[75%-
=
=1
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