问题标题：
数学问题：过程合并同类项：xy^2-1/3xy^2=?-5x^2y+3x^2y+2xy^2-4xy^2=?按照这种方法来解：【1】xy^2-1/5xy^2=（1-1/5）xy^2=4/5xy^2【2】-3x^2y+2x^2y+3xy^2-2xy^2=（-3+2）x^2y+（3-2）xy^2=-x^2y+xy^2^
问题描述：
数学问题：过程
合并同类项：xy^2-1/3xy^2=?-5x^2y+3x^2y+2xy^2-4xy^2=?
按照这种方法来解：【1】xy^2-1/5xy^2=（1-1/5）xy^2=4/5xy^2【2】-3x^2y+2x^2y+3xy^2-2xy^2=（-3+2）x^2y+（3-2）xy^2=-x^2y+xy^2
^
欧阳金龙回答：
xy^2-1/3xy^2==（1-1/3)xy^2=2/3xy^2
-5x^2y+3x^2y+2xy^2-4xy^2=(-5+3)x^2y+(2-4)xy^2=-2x^2y-2xy^2
好了
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