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Add using doubles minus one
Free printable Grade 1 math worksheet for "Add using doubles minus one" — practice addition strategies up to 20. No-prep, print or assign online.
This worksheet helps first-grade students practice addition using the doubles minus one strategy within 20. Teachers can use it to reinforce mental math skills and promote number sense by encouraging students to relate addition facts to known doubles. The exercises provide a structured approach to mastering addition strategies, ideal for classroom or homework use.
Learning objectives
- Identify doubles facts up to 10 + 10 to support addition.
- Apply the doubles minus one strategy to add numbers up to 20.
- Solve addition problems by recognizing one less than a double.
Answer Key
How to use this worksheet
- Click “Download Worksheet” and sign in with Google or email to get the PDF instantly.
- Print at home or in class for Grade 1; it's no-prep, with no extra materials needed.
- Use the included answer key to mark it in seconds.
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