0.7	=	0 ones, 7 tenths
1	=	1 one, 0 tenths
1.7	=	1 one, 7 tenths
7.1	=	7 ones, 1 tenth
Order from smallest to largest: 0.7 (0 ones) < 1 (1 one) < 1.7 (1 one, 7 tenths) < 7.1 (7 ones). The smallest number is 0.7.