Which best describes how to subtract 6.45 from 81.3?
Align the numbers on the decimal point. Place a zero in the hundredths place of 81.3.
Subtract from right to left, regrouping as necessary
Align the digits of the numbers on the right-most digit.
Subtract from right to left, regrouping as necessary.
Align the digits of the numbers on the left-most digit
Subtract from right to left, regrouping as necessary
Align the numbers on the decimal point.
Subtract from left to right, regrouping as necessary