若（m^2+n^2)^2+(p-2)=0,则近似数0.0mnpqr有几个有效数字?是哪几个?

已知m、n、p满足|2m|+m=0,|n|=n,p|p|=1.化简：|n|-|m-p-1|+|p+n|-|2n+1|.已知m、n、p满足|2m|+m=0，|n|=n，p|p|=1.化简：|n|-|m-p-1|+|p+n|-|2n+1|. 已知m、n、p满足/2m/+m=0,/n/=n,p/p/=1,化简/n/-/m-p-1/-/2n+1/. （m-2n-p)(m-2n+p)-(m+2n+p)(m+2n+p) 若 P=2m,m=2n,则m+p-n等于（） m-（2m-n-p）= （m+n)-( )=2m-p 若实数m,n,p满足m-n=8,mn+p^2+16=0,求m+n+p的值 |m-5|+|2n-3|+|4-p|=0,求m,n,p的值. 化简,1.[(m+n-p)(m+p+n)-(m+n)²]/(-p),2.[(m+n)(m-n)-(m-n)²+2n(m-n)]/4n 若|m+3|+|n-7/2|+|2p-1|=0,则p+2n+3m的值为 若|m+3|+|n-7/2|+|2p-1|=0,则p+2n+3m的值为 化简(-m+2n-p)(-p-2n+m) (2m+n-p)(2m-n+p) (2m+n-p)(2m-n-p)等于什么 （2m+n-p）（ 2m+p-n） (m-2n-p)(-m-2n-p) 化简:(2m+n-p)*(2m-n+p) (-2m-3n-p)(2m-3n-p)