To add decimals, line up the decimal points so that place-value positions correspond.
26.951
Practice makes perfect
Before we find the exact sum, we can make an estimate by rounding each addend. We will round 19.86 to 20 and 7.091 to 7 because they are the closest whole numbers.
20+7=27
The sum of 19.86 and 7.091 is about 27. Now we can find the exact sum. To add decimals, we line up the decimal points so that place-value positions correspond. Annex a zero so that each place has a digit.
Now we add the decimals, just as we would with whole numbers, and place the decimal point in the answer.
The sum of the given numbers is 26.951. The answer is really close to our estimation!
