是一道数学题:(-0.25)2007次方×(-4)2008次方-0.125 2008次方×8的2009次方 这道题怎么做啊,要详细

2025-04-07 09:59:52
推荐回答(6个)
回答(1):

(-0.25)2007次方)×(-4)的2008次方-0.125的 2008次方×8的2009次方
=(-1/4)^2007×(-4)^2007×(-4)-(1/8)^2008×8^2008×8
=[(-1/4)×(-4)]^2007×(-4)-(1/8×8)^2008×8
=1^2007×(-4)-1^2008×8
=1×(-4)-1×8
=-4-8
=-12

回答(2):

(—0.25)2007次方×(—4)2008次方—0.125 的2008次方×8的2009次方
=【(—0.25)×(—4)】的2007次方×(—4)—(0.125×8)的2008次方×8
= —4—8
= —12
这道题的关键是将0.25×4=1, 0.125×8=1这两个等式牢记在心。
在以后的解题过程中还会多次用到。

回答(3):

(-0.25)^2007×(-4)^2008-(0.125)^ 2008×(8)^2009
=(-0.25)^2007×[(-4)^2007×(-4)]-(0.125)^ 2008×[(8)^2008×8]
={[(-0.25)×(-0.4)]^2007}×(-4)-{(0.125×8)^2008}×8 注:其中 (-0.25)×(-0.4)=1且 0.125×8=1
=[(1)^2oo7]×(-4)-[(1)^2008]×8
=-4-8
=-12

回答(4):

原式=[(-0.25)×(-4)]2007次方×(-4)-[(-0.125)×8]2008次方×8

=1的2007次方×(-4)-1的2008次方×8

= -4-8

= -12

回答(5):

(-0.25)2007的次方×(-4)的2008的次方-0.125的 2008的次方×8的2009的次方
=(-1/4)^2007×(-4)^2007×(-4)-(1/8)^2008×8^2008×8
=[(-1/4)×(-4)]^2007×(-4)-(1/8×8)^2008×8
=1^2007×(-4)-1^2008×8
=1×(-4)-1×8
=-4-8
=-12
自己做的

回答(6):

原式=(-0.25x-4)2007次方x(-4)—(0.125x8)2008次方x8
=1 2007次方x-4—1 2008次方x8
=-4-8=-12

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