Free worksheets · Grade 5
Adding Decimals Worksheet
Line up the decimal points and add numbers with tenths and hundredths.
Free printable
Adding Decimals
14 questions, one page, US Letter. Print it and do it on paper.
On the sheet: Line up the decimal points, one number above the other. Add zeros so both numbers have the same number of digits after the point. Add as with whole numbers, starting at the right and carrying when a column makes ten or more. Put the decimal point in the answer straight below the others.
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About this worksheet
Adding decimals works like adding whole numbers once the places line up. Lining up the decimal points puts tenths over tenths and hundredths over hundredths.
Half the problems on this sheet add a number with tenths to one with hundredths, like 83.32 + 60.8. Writing a zero to fill the empty place keeps the columns even.
A worked example
88.1 + 45.97 = ?
- Write 88.1 as 88.10 so both numbers have two digits after the point.
- Line up the points and add from the right: 0 + 7 = 7, then 1 + 9 = 10, so write 0 and carry the 1.
- Keep adding: 8 + 5 + 1 = 14 and 8 + 4 + 1 = 13.
- Bring the point straight down into the answer.
Answer: 88.1 + 45.97 = 134.07
The common mistake
What it looks like: Lining up the last digits instead of the decimal points, so 88.1 + 45.97 adds the 1 to the 7.
Why it happens: Whole numbers line up on the right, and the habit carries over.
How to fix it: Line up the points first, then fill any empty place with a zero. Every column then holds one kind of place.
Ten minutes a day, on paper. We plan what comes next.
A printed page and a pencil. No screen, no login for your child. Snap a photo when they’re done: AI scores it, and what they missed comes back on the sheets that follow.
- Mon Adding Decimals
- Tue What they missed, back again
- Wed The next step, when they’re ready
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