求解答,急求解答,!!!!!!!
1个回答
2013-11-06
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(-1/2+1/3-7/6)x(-12)
=(-1/2)x(-12)+1/3x(-12)-7/6x(-12)
=6-4+14
=16
25x3/4-(-25)x1/2+25x(-1/4)
=25x(3/4+1/2-1/4)
=25x1
=25
=(-1/2)x(-12)+1/3x(-12)-7/6x(-12)
=6-4+14
=16
25x3/4-(-25)x1/2+25x(-1/4)
=25x(3/4+1/2-1/4)
=25x1
=25
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