Before we find the exact difference, we can make an estimate by rounding the given numbers. We will round 31.15 to 31 because it is the closest whole number.
89-31=58The difference between 89 and 31.15 is about 58. To subtract decimals, we line up the decimal points so that place-value positions correspond. Annex zeros so that each place has a digit.
Now we subtract the decimals just as we would with whole numbers and place the decimal point in the answer.
Our answer 57.85 is really close to our estimation!
