Worksheet
Grade 1
Subtracting with Moon
Worksheet · 1.OA.C.6
$1.50
Math · Curriculum resources
Subtraction Within 20 Worksheets and Activities
Find a comprehensive collection of Within 20 curriculum resources spanning grade 1 and beyond, including worksheets, games, reading passages, and activities. These materials help students build fluency with addition and subtraction facts up to 20, from initial introduction to deeper conceptual understanding.
14 results
Interactive
Grade 1
Grade 1 Addition and Subtraction Word Problems Within 20
Game · 1.OA.A.1
$1.50
Worksheet
Grade 1
I Can Add and Subtract
Worksheet · 1.OA.B.4
Free
Interactive
Grade 1
Grade 1 Subtraction as Unknown Addend Problems
Game · 1.OA.B.4
$1.50
Worksheet
Grade 1
Subtracting (within 20) Suns
Worksheet · 1.OA.C.6
$1.50
Interactive
Grade 1
Addition and Subtraction Within 20
Game · 1.OA.C.6
$1.50
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Worksheet
Grade 1
Fact Family
Worksheet · 1.OA.B.4
$1.50
Interactive
Grade 1
Equal Sign and True False Equations Grade 1
Game · 1.OA.D.7
$1.50
Worksheet
Grade 1
Fact Family Triangles
Worksheet · 1.OA.B.4
$1.50
Interactive
Grade 1
Missing Numbers in Addition and Subtraction Equations Grade 1
Game · 1.OA.D.8
$1.50
Worksheet
Grade 1
Subtraction Within 20
Worksheet · 1.OA.A.1
$1.50
Worksheet
Grades 1–2
Subtraction within 20 Color by Number — Farm Animal Rabbit
Worksheet · 1.OA.C.6
$1.50
Worksheet
Grades 1–2
Subtraction within 20 Color by Number — Zoo Animal Elephant - 2
Worksheet · 1.OA.C.6
$1.50
Worksheet
Grades 1–2
Subtraction within 20 Color by Number — plant 10
Worksheet · 1.OA.C.6
$1.50
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About these Subtraction Within 20 worksheets and activities
The concept of Within 20 is a foundational math skill that develops across early elementary grades. In grade 1, students begin by adding and subtracting within 20 using concrete models like counters or pictures, then progress to mental strategies and fact fluency. They explore fact families, missing addends, equal sign meaning, and true/false equations. As the skill deepens, students apply these facts to word problems and build automaticity through repeated practice. Related concepts include part-part-whole relationships, commutative property, and inverse operations.
Our resources cover this progression with varied formats: worksheets for practice, color-by-number activities for engagement, fact family triangles for relational thinking, and word problems for real-world application. Each resource is teacher-authored and designed to scaffold learning from concrete to abstract, ensuring students master addition and subtraction within 20 before moving to larger numbers.
Using these in your classroom
Teachers can use this hub to differentiate instruction across a mixed-ability classroom. Choose introductory worksheets with visual supports for struggling students, fact family activities for on-level practice, and word problems or color-by-number for enrichment. The resources work well for whole-group mini-lessons, small-group guided practice, independent work at centers, or homework. Use printable PDFs for paper-and-pencil tasks or assign digital versions for self-checking practice. The no-prep format saves planning time, making it easy to pull resources for intervention, review, or assessment. Mix and match activities to keep students engaged while building fluency.
Standards alignment
These resources align with Common Core standards for operations and algebraic thinking across grades 1 and 2, focusing on addition and subtraction within 20, fact fluency, and understanding of the equal sign. They support key grade-level expectations for building computational fluency.
Frequently asked questions
Are these Within 20 worksheets printable?
Yes, all resources are available as printable PDFs. Some also include a digital version for interactive use. You can print them for classroom use or assign them online through Workybooks.
Are these Within 20 worksheets for kids in multiple grades?
Yes, the resources are designed for students in grades 1 and 2, with some materials suitable for kindergarten enrichment or grade 3 review. Each activity indicates the target grade level so you can choose the right fit.
Do I need a membership to access these resources?
Some resources are free, but most require a paid Workybooks membership. With a membership, you get unlimited access to all printable and digital materials on the platform.
What types of resources are included beyond worksheets?
In addition to worksheets, the collection includes color-by-number activities, fact family triangles, word problems, and interactive digital games. These varied formats help keep students engaged while building fluency.