1. 直接写出得数。                                                                                                                                      

5x+8x=	10m-m=	x-0.5x=	5n+7n=
2y-0.7y=	y×6×y=	（a+b）×8=	8-a×5=
n+1.8n=	7a+6a-10=	13.7b+3b=	11+3.6m-2m=