Grade 6 Adding Multi-Digit Decimals
Grade 6 decimal addition out to the thousandths place using the standard algorithm. Sixteen problems with a complete answer key, free to print.
Download
Three different problem sets — same skill, same layout, fresh numbers.
Preview — Set A
Add the decimals using the standard algorithm. Line up the decimal points.
- 1.51.366 + 33.324 =
- 2.52.481 + 71.039 =
- 3.64.644 + 98.271 =
- 4.88.048 + 5.426 =
- 5.21.285 + 65.226 =
- 6.73.864 + 91.162 =
- 7.39.458 + 79.942 =
- 8.3.861 + 48.023 =
- 9.49.188 + 83.607 =
- 10.45.608 + 58.543 =
- 11.51.291 + 73.553 =
- 12.60.441 + 21.068 =
- 13.43.453 + 8.341 =
- 14.61.665 + 90.375 =
- 15.50.603 + 8.397 =
- 16.61.136 + 66.223 =
What this worksheet covers
Set A of this grade 6 drill sheet holds sixteen decimals problems on one printable page, with the answer key on the page behind it. What makes this set particular: operands run to three decimal places, so the decimal points have to be lined up rather than the right-hand digits and the numbers run as high as 98.271. Two problems from the middle of the page — "73.864 + 91.162" and "51.291 + 73.553" — show the range. The sheet sits inside Common Core 6.NS.3, in the grade 6 The Number System strand.
Skills practised
At grade 6, decimals is about multiplying and dividing decimals by decimals, and multi-digit decimal sums and differences, and this sheet takes one slice of that. The skill on the page: grade 6 Adding Multi-Digit Decimals. To finish it, a student has to keep the decimal points aligned.
About the drill format
This drill runs 16 problems in a steady layout, so the eye never has to hunt for the next one; problem 6, "73.864 + 91.162" shows the level it holds. A run of one decimal operation is where point alignment stops being a decision and becomes a habit.
Set A, Set B and Set C
Set A is the original MathSheetLab worksheet; Sets B and C keep its structure and redraw the numbers, with each answer recomputed rather than copied. Where Set A's problem 9 is "49.188 + 83.607", Set B's is "61.611 + 95.268".
How to use this worksheet
Expect twenty minutes or so of real attention for sixteen problems. At grade 6, decimals rewards care over speed — a rushed drill gets the arithmetic right and the signs or units wrong. Date the drill before filing it. Set C from six weeks later is the cheapest evidence you have that the decimals stuck.
One mistake to watch for
Decimals are aligned to the right: 3.5 + 0.42 = 3.92. Problem 11 on this grade 6 drill page, "51.291 + 73.553", is where to look for it.
The right-alignment habit from whole numbers is being applied to a notation where the point, not the right edge, fixes the value.
Write in the placeholder zero (3.50) before adding; aligning the points then aligns everything else.
Other grade 6 decimals formats
The same skill in the other formats available at this grade.
- Timed Drill — Grade 6 Decimals Timed Drill, 60 problems
- Missing Number — Grade 6 Decimals Missing Number, 24 problems
- Mixed Review — Grade 6 Subtracting Multi-Digit Decimals, 16 problems
- Word Problems — Grade 6 Decimals Word Problems, 10 problems
A step either side
The same format one grade down and one grade up — the easier sheet is often the faster fix when this one is not landing.
- Grade 5 Adding Decimals to Hundredths — grade 5, 18 problems
- Grade 7 Multiplying Rational Numbers — grade 7, 20 problems
Drill sheets in other grade 6 topics
Free to download, print and photocopy for a whole class: three drill sheets of grade 6 decimals, sixteen problems each, keys included.