问题
填空题
计算:(-x2y2-2xy)÷(-xy)=______;(-8mn+2-4m2)÷(-2m)2=______.
答案
(-x2y2-2xy)÷(-xy)=xy+2;
(-8mn+2-4m2)÷(-2m)2
=(-8mn+2-4m2)÷4m2
=-2mn-1.
故答案为:xy+2;-2mn-1.
计算:(-x2y2-2xy)÷(-xy)=______;(-8mn+2-4m2)÷(-2m)2=______.
(-x2y2-2xy)÷(-xy)=xy+2;
(-8mn+2-4m2)÷(-2m)2
=(-8mn+2-4m2)÷4m2
=-2mn-1.
故答案为:xy+2;-2mn-1.