Free Addition and Subtraction within 20
A full unit on adding and subtracting within 20: count on, make a ten, doubles plus one, fact families, number lines and word problems — with a strategy page and a unit quiz.
All 3 worksheets in color and black & white, with the answer key · 11 pages, free to print.
Want the whole unit?
Addition and Subtraction within 20 — Classic
| What you get | This free sample | Full set |
|---|---|---|
| Worksheets | 3 | 11 |
| Pages in the file | 11 | 28 |
| Color + black & white | ✓ | ✓ |
| Answer key | ✓ | ✓ |
| Every skill in the unit | A taste | ✓ All of it |
| Fresh problems made for your order | — | ✓ |
- 3 free worksheets from the full set
- Color + black & white, with answer key
- Print as many copies as you need for your class
- Grade
- Grade 1
- In the file
- 3 worksheets in color, the same 3 in black & white, answer key · 11 pages
- Format
- PDF, US Letter (8.5 × 11 in)
- Standards
1.OA.A.1Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions.
1.OA.B.4Understand subtraction as an unknown-addend problem.
1.OA.C.5Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
1.OA.C.6Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction; and creating equivalent but easier or known sums (e.g., doubles plus one).
1.OA.D.8Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
Free to print and share with your class. Want more practice on one topic? Every page comes from one of our full sets — follow the topic links below.
What's inside
- Picture Addition and Subtraction
- Making 10 to Add
- Word Problems within 20
Every worksheet comes in color and in black & white, with an answer key at the end.
How to use these math worksheets
Use the reference page to teach or review, then pick the worksheets that fit your lesson. They work for small groups, morning work, centers and homework. The last page is a short assessment.
Skills practiced
More practice: first grade addition, subtraction & word problems worksheets · all first grade math worksheets
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