直接写出得数。                                                                                                                 

2×0.6×5=	2×2.8×0=	1.2×4+1.2=
3-4×0.6=	1.3×（2.5+2.5）=	1.6×3-2.1=
6×0.8-0.8=	0.6×8+5=	（1.7+2.3）×0.6=