9.10题要过程
发布网友
发布时间:2024-10-18 18:06
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热心网友
时间:2024-10-18 18:18
解:
9.
原式=(9/12+10/12-6/12)*(-12)-9
=13/12*(-12)-9
=-13-9
=-22
10.
原式=-2-[-4+(1-3/2)/(-1)]
=-2-[-4+(-1/2)/(-1)]
=-2-(-4+1/2)
=-2-(-7/2)
=-2+7/2
=3/2
热心网友
时间:2024-10-18 18:19
(3/4+5/6-1/2)*(-12)-3^2
=(9/12+10/12-6/12)*(-12)-9
=-9-10+6-9
=6-28
=-22
-2-[-4+(1-2*3/4)/(-1)]
=-2+4-(1-2*3/4)/(-1)
=2+1-3/2
=3-3/2
=3/2或者1又2分之1
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