9.81×0.1+0.5×98.1+0.049×981.
问题描述:
9.81×0.1+0.5×98.1+0.049×981.
答
9.81×0.1+0.5×98.1+0.049×981
=9.81×0.1+9.81×5+9.81×4.9,
=9.81×(0.1+5+4.9),
=9.81×10,
=98.1.