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,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)²4.化简:4ab+8-2b²-9ab-65.先化简,再求值:已知:3x²y-2x²y-3(2xy-x²y)-

题目详情
,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
▼优质解答
答案和解析
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