Addition and Subtraction within 20
The same complete within-20 unit with a pet shop theme — puppies, hamsters and goldfish in every picture and word problem. Different problems from the other editions.
3 of the 11 worksheets in color and black & white, with the answer key · 10 pages, free to print.
- Strategy reference sheet + practice + quiz
- New problems in every edition
- Answer key for every page
- Grade
- Grade 1
- Full set
- 11 worksheets in color, the same 11 in black & white, answer key · 28 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.
The full set is on its way. Try the free sample with your class now. Leave your email when you download and we'll tell you when new worksheets are ready.
What's inside
- Addition & Subtraction Strategies
- Picture Addition and Subtraction
- Number Line to 20
- Making 10 to Add
- Doubles and Doubles Plus 1
- Fact Families and Missing Addends
- Addition within 20
- Subtraction within 20
- Addition and Subtraction within 20
- Word Problems within 20
- Assessment
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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