Decimal worksheets (addition)
Twenty decimal additions in column layout — tenths on both lines, decimal points stacked.
Best fit: 4th–5th grade · 8 sheets, answer keys included · Free, no sign-up
The full set: 8 worksheets with answer keys
Eight sheets in the same layout with different problems: download them as one PDF or print one at a time.
Worksheets
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Sheet 1
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Sheet 2
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Sheet 3
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Sheet 4
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Sheet 5
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Sheet 6
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Sheet 7
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Sheet 8
Answer keys
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Sheet 1 answers
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Sheet 2 answers
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Sheet 3 answers
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Sheet 4 answers
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Sheet 5 answers
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Sheet 6 answers
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Sheet 7 answers
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Sheet 8 answers
About these worksheets
Decimal addition is column addition with one extra rule: line up the decimal points and the place values line up automatically. Each sheet’s twenty problems use tenths on both lines (like 45.7 + 12.3), pre-aligned so the correct habit is modeled on every problem. Carrying works exactly as with whole numbers (tenths carry into ones), so a child who can carry with whole numbers already knows how.
Grade level: these worksheets are part of our 5th grade math worksheets collection.
Frequently asked questions
Why line up the decimal points?
It aligns tenths with tenths and ones with ones. Right-aligning digits (the whole-number habit) breaks as soon as the numbers have different lengths.
Do these problems carry across the decimal point?
Yes — 0.7 + 0.6 carries one whole across the point, exactly like any other column carry. That’s the key connection.
Can I get harder or subtraction versions?
Not from the generator, which makes whole-number sheets only. For harder decimal addition, the money worksheets use hundredths. There is no decimal subtraction set on the site.