Grade 1 Equal Groups: Repeated Addition to 20
Equal groups as repeated addition for grade 1, the first step toward multiplication, with every total 20 or less. Sixteen problems and an answer key.
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Three different problem sets — same skill, same layout, fresh numbers.
Preview — Set A
Count the equal groups and add. Each answer is 20 or less.
- 1.2 groups of 3: 3 + 3 =
- 2.3 groups of 2: 2 + 2 + 2 =
- 3.2 groups of 4: 4 + 4 =
- 4.4 groups of 2: 2 + 2 + 2 + 2 =
- 5.3 groups of 3: 3 + 3 + 3 =
- 6.5 groups of 2: 2 + 2 + 2 + 2 + 2 =
- 7.2 groups of 5: 5 + 5 =
- 8.2 groups of 6: 6 + 6 =
- 9.6 groups of 2: 2 + 2 + 2 + 2 + 2 + 2 =
- 10.4 groups of 3: 3 + 3 + 3 + 3 =
- 11.3 groups of 4: 4 + 4 + 4 =
- 12.5 groups of 3: 3 + 3 + 3 + 3 + 3 =
- 13.3 groups of 5: 5 + 5 + 5 =
- 14.4 groups of 4: 4 + 4 + 4 + 4 =
- 15.5 groups of 4: 4 + 4 + 4 + 4 + 4 =
- 16.4 groups of 5: 5 + 5 + 5 + 5 =
What this worksheet covers
Sixteen mixed operations problems fill this mixed review page; problem 6 asks "5 groups of 2: 2 + 2 + 2 + 2 + 2", and the sheet stays at that level throughout. What makes this set particular: the quantities stay small, which keeps the idea in the foreground rather than the size of the numbers. Further down, problem 11 asks "3 groups of 4: 4 + 4 + 4". It is written against Common Core 1.OA.6 — Operations & Algebraic Thinking, grade 1.
Skills practised
Grade 1 mixed operations means addition and subtraction within 20 on the same page, and fact families. Specifically, the problems practise grade 1 Equal Groups: Repeated Addition to 20. To finish it, a student has to recall the mixed operations facts quickly and accurately, without counting up to them. Eight different answers appear across the sixteen problems, so a student cannot copy one result down the page.
About the mixed review format
The 16 problems are deliberately assorted — problem 6, "5 groups of 2: 2 + 2 + 2 + 2 + 2" is followed by something of another shape — so the student has to read each one rather than run the last method again. This format is the operation's natural home: every problem shape the grade knows, in no fixed order.
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 "6 groups of 2: 2 + 2 + 2 + 2 + 2 + 2", Set B's is "5 groups of 2: 2 + 2 + 2 + 2 + 2".
How to use this worksheet
Sit alongside for this mixed operations mixed review. At grade 1 the useful information is not the score but which of the sixteen problems drew a pause. Print Set B of this mixed operations mixed review before writing on Set A; the same skill worked twice a week apart tells you far more than once.
One mistake to watch for
Fact families are memorised as four unrelated facts. On this grade 1 mixed review, problem 11 ("3 groups of 4: 4 + 4 + 4") is the kind of item where it shows.
The part-part-whole relationship behind them has not been made visible.
Draw one bar model and write all four equations from it, so the family is one picture with four sentences.
Other grade 1 mixed operations formats
The same skill in the other formats available at this grade.
- Drill — Grade 1 Mixed Addition and Subtraction to 20, 20 problems
- Timed Drill — Grade 1 Mixed Operations Timed Drill, 60 problems
- Missing Number — Grade 1 Mixed Operations Missing Number, 24 problems
- Word Problems — Grade 1 Sharing Equally, 12 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 2 Mixed Operations Mixed Review — grade 2, 24 problems
Mixed Review sheets in other grade 1 topics
Six PDFs, no sign-up: three versions of this grade 1 mixed operations mixed review and three answer keys, each sixteen problems long.