若-3xmy5与0.4x3y2n+1是同类项,则m+n=______.
题型:填空题难度:简单来源:不详
若-3xmy5与0.4x3y2n+1是同类项,则m+n=______. |
答案
若-3xmy5与0.4x3y2n+1是同类项, 则m=3; 2n+1=5,n=2. 则m+n=5. |
举一反三
已知2xby3a与-3x2ay5-b是同类项,则a=______,b=______. |
若-x4y6与3xm-1y3n是同类项,则m=______;n=______. |
化简:-[+(-5)]=______;+2(a+b-1)=______. |
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