Common CoreCCSS.Math.Content.1.OA.1CCSS-2010

Use addition and subtraction within 20 to solve word problems

Common Core·math·Grade 1·Bloom: Apply·Last verified: May 17, 2026

Use 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.

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Skills that teach this standard (2)

1 with free practice questions

Connecting maths to real life →

Mathematical Thinking · Ages 6–7 · try 3 free questions

Early Word Problems

Addition & Subtraction · Ages 5–7 · questions coming soon

Concepts covered (29)

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Adding Single-Digit Numbers

addition · math · Grade 1

Using Manipulatives For Addition

addition · math · Grade 1

Understanding Commutative Property

addition · math · Grade 1

Using Addition In Real-Life Situations

addition · math · Grade 1

Adding Within 20

addition · math · Grade 1

Understanding Subtraction as Taking Apart

subtraction · math · Grade 1

Understanding Addition as Putting Together

addition · math · Grade 1

Subtracting Within 20

subtraction · math · Grade 1

Understanding Addition Vocabulary

addition · math · Grade 1

Recognizing Addition Patterns

addition · math · Grade 1

Adding Two-Digit Numbers Without Regrouping

addition · math · Grade 1

Understanding Subtraction As Taking Away

subtraction · math · Grade 1

Using Number Lines For Subtraction

subtraction · math · Grade 1

Subtracting Using Objects

subtraction · math · Grade 1

Finding Missing Numbers In Subtraction

subtraction · math · Grade 1

Comparing Quantities With Subtraction

subtraction · math · Grade 1

Understanding Addition As Combining

addition · math · Grade 1

Using Number Lines For Addition

addition · math · Grade 1

Solving Word Problems With Addition

addition · math · Grade 1

Adding With Ten Frames

addition · math · Grade 1

Estimating Sums

addition · math · Grade 1

Subtraction Word Problems

subtraction · math · Grade 1

Subtraction With Regrouping Basics

subtraction · math · Grade 1

Subtraction Using Drawings

subtraction · math · Grade 1

Subtraction With Numbers Up To 10

subtraction · math · Grade 1

Identifying Subtraction Facts

subtraction · math · Grade 1

Understanding Zero In Subtraction

subtraction · math · Grade 1

Subtraction Facts Practice

subtraction · math · Grade 1

Counting Forward To Add

addition · math · Grade 1

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