2.MD.6 — Subtraction on a Number Line
Practice subtracting whole numbers within 100 by hopping back on a number line diagram to find the difference between two numbers accurately.
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Three different problem sets — same skill, same layout, fresh numbers.
Preview — Set A
Use the number line to find each difference, then write the answer.
- 1.10 - 3 =
- 2.15 - 5 =
- 3.20 - 8 =
- 4.18 - 9 =
- 5.25 - 7 =
- 6.30 - 12 =
- 7.40 - 15 =
- 8.35 - 16 =
- 9.50 - 20 =
- 10.45 - 18 =
- 11.60 - 25 =
- 12.55 - 27 =
- 13.70 - 30 =
- 14.65 - 38 =
- 15.80 - 45 =
- 16.75 - 49 =
- 17.90 - 50 =
- 18.85 - 56 =
- 19.100 - 63 =
- 20.98 - 74 =
What this worksheet covers
There are twenty subtraction problems here — one page to work, one page of answers to check against — and Sets B and C repeat the layout with different numbers. Within that, fifteen of the twenty 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 100. Problems 7 and 14, for instance, are "40 - 15" and "65 - 38". It is written against Common Core 2.MD.6 — Measurement & Data, grade 2.
Skills practised
Grade 2 subtraction means two-digit subtraction within 100 with regrouping, and mental subtraction of 10 and 100. Specifically, the problems practise subtraction on a Number Line. Concretely, the sheet tests whether a student can regroup past ten rather than counting up one at a time. Sixteen different answers appear across the twenty problems, so a student cannot copy one result down the page.
About the mixed review format
Mixed review changes the problem shape as the page goes on, so the 20 problems here cover more than one shape rather than one procedure repeated; problem 7, "40 - 15" sits next to problems of a different kind. Mixing regrouping and non-regrouping problems stops a student from borrowing on every problem out of habit.
Set A, Set B and Set C
Set A is the sheet as it was first published on MathSheetLab, and Sets B and C were derived from it problem by problem: each number became a slot redrawn with the same shape, and every answer was recomputed exactly. Where Set A's problem 11 is "60 - 25", Set B's is "80 - 67".
How to use this worksheet
Sit alongside for this subtraction mixed review. At grade 2 the useful information is not the score but which of the twenty problems drew a pause. Keep the key face down until all twenty problems are finished, then go through the misses together rather than only totalling the score.
One mistake to watch for
Subtraction facts are recomputed by counting back one at a time. Problem 14 on this grade 2 mixed review page, "65 - 38", is where to look for it.
The relationship to addition has not been made explicit, so 13 − 8 is not being read as "8 plus what is 13".
Practise fact families as a unit, four equations at a time, and give unknown-addend problems alongside the subtraction ones.
Other grade 2 subtraction formats
The same skill in the other formats available at this grade.
- Drill — Grade 2 Subtraction Practice, 20 problems
- Timed Drill — Grade 2 Subtraction Timed Drill, 60 problems
- Missing Number — Grade 2 Subtraction Missing Number, 24 problems
- Word Problems — Grade 2 Subtraction Word Problems, 8 problems
- Vertical Format — Grade 2 Subtraction Vertical Format, 20 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 1 Subtraction Mixed Review — grade 1, 24 problems
- Grade 3 Subtraction Mixed Review — grade 3, 30 problems
Mixed Review sheets in other grade 2 topics
No paywall and no account — download any set of this grade 2 subtraction mixed review, and the answers for all twenty problems are in the matching key.