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” to get the PDF — free with a KiwiBee account (up to 25 downloads a month).
- 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.
Frequently asked questions
Is the “Add using doubles minus one” worksheet free?
Yes. “Add using doubles minus one” is a free printable Math worksheet. Sign in with a free KiwiBee account to download the PDF — it includes up to 25 downloads a month.
What grade or age is this Math worksheet for?
It's designed for Grade 1 (ages 6–7), covering Addition strategies up to 20.
Does it come with an answer key?
Yes — a matching answer key is included so you can grade it in seconds.
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