Grade 1 Addition Practice
Eighteen grade 1 addition problems with sums to 20, seven of which cross a ten and need regrouping. Free printable PDF with the answer key.
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Three different problem sets — same skill, same layout, fresh numbers.
Preview — Set A
Solve each problem. Show your work in the space provided.
- 1.3 + 16 =
- 2.11 + 13 =
- 3.8 + 14 =
- 4.12 + 20 =
- 5.5 + 2 =
- 6.8 + 16 =
- 7.8 + 18 =
- 8.10 + 3 =
- 9.2 + 9 =
- 10.1 + 4 =
- 11.16 + 6 =
- 12.2 + 13 =
- 13.1 + 12 =
- 14.18 + 9 =
- 15.15 + 19 =
- 16.13 + 2 =
- 17.4 + 3 =
- 18.11 + 1 =
What this worksheet covers
There are eighteen addition problems here — one page to work, one page of answers to check against — and Sets B and C repeat the layout with different numbers. Seven of the eighteen column problems need regrouping and the rest do not, so the two cases are mixed rather than blocked and the numbers run as high as 20. Problems 7 and 13, for instance, are "8 + 18" and "1 + 12". It is written against Common Core 1.OA.6 — Operations & Algebraic Thinking, grade 1.
Skills practiced
Grade 1 addition means fact fluency within 20, three addends, and two-digit plus one-digit numbers. Specifically, the problems practice grade 1 Addition Practice. Concretely, the sheet tests whether a student can regroup past ten rather than counting up one at a time. Thirteen different answers appear across the eighteen problems, so a student cannot copy one result down the page.
About the drill format
A drill is straight practice: 18 problems of the same kind, laid out across the page with working space under each — problem 7, "8 + 18" is typical of the whole page. A straight run of sums is where regrouping becomes routine rather than an event.
Set A, Set B and Set C
Set A is the original sheet; Sets B and C redraw each problem with the same shape and recomputed answers. Where Set A's problem 10 is "1 + 4", Set B's is "9 + 6".
How to use this worksheet
Grade 1 attention runs short, so split these eighteen addition problems over two or three sittings rather than pushing through in one; a number line or counters within reach is a strategy, not a failure. Mark the eighteen problems the same day using the key — an error caught immediately is a correction, and one caught next week is a habit.
One mistake to watch for
Regrouping is skipped: 47 + 38 is answered 715 instead of 85. On this grade 1 drill, problem 6 ("8 + 16") is the kind of item where it shows.
Each column is treated as its own one-digit problem with no place-value structure joining them.
Return to expanded form for a few days and ask what 7 + 8 is worth; fifteen ones cannot sit in the ones column.
Other grade 1 addition formats
The same skill in the other formats available at this grade.
- Timed Drill — Grade 1 Addition Timed Drill, 60 problems
- Missing Number — Grade 1 Addition Missing Number, 24 problems
- Mixed Review — Adding Three Numbers — Grade 1 Word Problems, 22 problems
- Word Problems — Adding Up: Grade 1 Word Problems Within 20, 22 problems
- Vertical Format — 1.NBT.4 — Adding Within 100: Two-Digit & One-Digit Numbers, 22 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.
- Kindergarten Addition Drill — kindergarten, 20 problems
- Grade 2 Addition Practice — grade 2, 20 problems
Drill sheets in other grade 1 topics
No paywall and no account — download any set of this grade 1 addition drill, and the answers for all eighteen problems are in the matching key.