问题标题:
,只要答案就OK,.1.-1+(+11)-(-8)+(-4)2.8-2×(-3)-(-4)÷(-½)3.-1²-|0.5-2/3|÷1/3×【-2-(-3)²】4.化简:4ab+8-2b²-9ab-65.先化简,再求值:已知:3x²y-【2x²y-3(2xy-x²y)-
问题描述:

,只要答案就OK,.

1.-1+(+11)-(-8)+(-4)

2.8-2×(-3)-(-4)÷(-½)

3.-1²-|0.5-2/3|÷1/3×【-2-(-3)²】

4.化简:4ab+8-2b²-9ab-6

5.先化简,再求值:已知:3x²y-【2x²y-3(2xy-x²y)-xy】其中x=-1,y=-2

6.解方程:8x-15=3x+30

郝丽杰回答:
  1.-1+(+11)-(-8)+(-4)=14   2.8-2×(-3)-(-4)÷(-½)=6   3.-1²-|0.5-2/3|÷1/3×【-2-(-3)²】=-13/2   4.化简:4ab+8-2b²-9ab-6=-5ab-2b²+2   5.先化简,再求值:3x²y-【2x²y-3(2xy-x²y)-xy】=xy(7-2x)   =(-1)*(-2)*(7+2)=18   6.解方程:8x-15=3x+30   5X=45   X=9
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