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数学
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(-5p)*2pg=?
2x*5*x=?
1/4m*4n*(-p)=?
6*3x除以2x*5=?
7+m+6+3m=?
8x^+2x+7x^+3x=?
最后就是为什么m+n-m+n=2N?
人气:358 ℃ 时间:2020-03-27 08:35:52
解答
-10p²g
10x²
-pmn
9/5
13+4m
m+n-m+n=(m-m)+(n+n)=2n
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