Mixed operations
Decimal addition and subtraction
Add and subtract exact fixed-place decimals with one to three fractional digits and up to four digits left of the decimal.
Preview and downloadAddition practice
Adding decimals
Print adding decimals worksheets with a separate answer key. Choose two, three or four addends, one to three decimal places and aligned vertical working.
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Line up decimal points, add placeholder zeros when helpful, add each column, and bring the decimal point straight into the sum.
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What this activity builds
Add decimals exactly by aligning equal place values and preserving the intended decimal scale.
Worked example
Add the column containing 12.750, 3.608 and 0.400.
16.758
12.750 3.608 + 0.400 ─────── 16.758
With three digits right of the decimal selected, every addend uses thousandths, including trailing zeros. Align the decimal points: thousandths 0 + 8 + 0 = 8; hundredths 5 + 0 + 0 = 5; tenths 7 + 6 + 4 = 17, so write 7 tenths and carry 1 to the ones. The whole-number columns then total 16.
Teaching notes
Make the practice count
- Every addend uses the same selected number of digits right of the decimal. Trailing zeros remain visible; this generator does not mix fractional widths within a sheet.
- Estimate with whole numbers so a misplaced decimal is easy to detect.
- Read each addend by place value before calculating.
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A useful next step
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Add two to five addends with one-, two-, three-, or four-digit values in aligned vertical columns.
Preview and downloadMatch decimal addition to the lesson
Choose two addends first, then three or four for longer column work. The selected one to three decimal places applies to every addend on the sheet; trailing zeros preserve the chosen width. Align decimal points and corresponding place-value columns. Use the mixed activity when subtraction is part of the lesson.