Which number in the following group of numbers represents the smallest amount .999 999 .9 1 2 .88?

The smallest number in the group is 0.88. When comparing decimal numbers, you look at the digits to the left of the decimal point first. In this case, 0.88 has the smallest value to the left of the decimal point. The other numbers, such as 0.999, 0.999999, 0.9, and 1.2, all have larger values to the left of the decimal point, making 0.88 the smallest in this group.