To add decimals, line up the decimal points so that place-value positions correspond.
$ 75.14
Practice makes perfect
Before we find the exact sum, we can make an estimate by rounding each addend. We will round $ 66.99 to $ 67 and $ 8.15 to $ 8 because they are the closest whole numbers.
$ 67+$ 8=$ 75The sum of $ 66.99 and $ 8.15 is about $ 75. Now we can find the exact sum. To add decimals, we line up the decimal points so that place-value positions correspond. Let's ignore the dollar unit for now.
Now we add the decimals, just as we would with whole numbers, and place the decimal point in the answer.
The answer $ 75.14 is really close to our estimation!
