To add decimals, line up the decimal points so that place-value positions correspond.
45.93
Practice makes perfect
Before we find the exact sum, we can make an estimate by rounding each addend. We will round 32.5 to 33 and 13.43 to 13 because they are the closest whole numbers.
33+13=46The sum of 32.5 and 13.43 is about 46. 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 answer 45.93 is really close to our estimation!
