将6.7,0.067,0.607,0.076,0.67按从小到大顺序排列. .
= ×= ×4= =1.
0的倒数是它本身. .
×=1,所以和是倒数. .
× =× =×a(a≠0)
× = ×=0.1× = ×17=1.