问题
计算题
合并同类项
(1)3y+2y﹣6y
(2)x﹣(f﹣2m)+(5x﹣4f)+m.
答案
解:(1)3y+2y﹣6y
=(3+2﹣6)y
=﹣y;
(2)x﹣(f﹣2m)+(5x﹣4f)+m
=x﹣f+2m+5x﹣4f+m
=x+5x+2m+m﹣f﹣4f
=6x+3m﹣5f.
合并同类项
(1)3y+2y﹣6y
(2)x﹣(f﹣2m)+(5x﹣4f)+m.
解:(1)3y+2y﹣6y
=(3+2﹣6)y
=﹣y;
(2)x﹣(f﹣2m)+(5x﹣4f)+m
=x﹣f+2m+5x﹣4f+m
=x+5x+2m+m﹣f﹣4f
=6x+3m﹣5f.