问题
解答题
合并同类项
(1)3y+2y-6y
(2)x-(f-2m)+(5x-4f)+m.
答案
(1)3y+2y-6y=(3+2-6)y=-y;
(2)x-(f-2m)+(5x-4f)+m=x-f+2m+5x-4f+m=x+5x+3m-f-4f=6x+3m-5f.
合并同类项
(1)3y+2y-6y
(2)x-(f-2m)+(5x-4f)+m.
(1)3y+2y-6y=(3+2-6)y=-y;
(2)x-(f-2m)+(5x-4f)+m=x-f+2m+5x-4f+m=x+5x+3m-f-4f=6x+3m-5f.