a-b-c+d=a-b-(______)=a+(______)=a-(______).
题型:填空题难度:一般来源:不详
a-b-c+d=a-b-(______)=a+(______)=a-(______). |
答案
a-b-c+d=a-b-(c-d)=a+(-b-c+d)=a-(b+c-d). 故答案是:c-d,-b-c+d,b+c-d. |
举一反三
若单项式3x4yn与-2x2m+3y3的和仍是单项式,则(4m-n)n=______. |
若5xy2+axyb=-2xyb,则ab=______. |
已知-25a2mb和7b3-na4是同类项,则m+n的值是( ) |
若-xmy4+xy4=-xym-n,则m=______,n=______. |
若3xm+5y与x3y是同类项,则m=______. |
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