Doubles facts represent adding two equal quantities, such as , and include the basic sums from through . Knowing these facts supports fluent addition and related subtraction within 20, helps identify equal quantities in equations and visual representations such as ten-frames or number lines, and provides a foundation for using near-doubles strategies without extending to larger-number generalizations.
On this page:
- Learn “Use doubles facts” with a detailed explanation of the concept
- Master “Use doubles facts” with unlimited, free practice problems
- Download (or modify) a free worksheet on Use doubles facts you can use at home or in class with practice problems that scaffold and explore “Use doubles facts” from different perspectives.
- Start working on adaptive units like “Picture Numbers - Addition Intro” or “Picture Numbers - Subtraction Intro” that introduce, teach, or practice “Use doubles facts” to maximize your learning.
Detailed Explanation: Use doubles facts
A double is when you add the same number two times. For example, is a double because both numbers are .
Example: Solve
- Notice that the two numbers are equal: and .
- Start with .
- Count on more: .
- So, .
The doubles fact is:
You can use doubles facts from through .
Learn by doing: Use doubles facts
Click a topic below to practice the foundational skills you'll need, learn the steps, or master this skill
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Practice:
Addition - Whole Number - Doubles
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Download/Modify Free Grade 1 'Use doubles facts' Worksheet
Print this free 'Use doubles facts' worksheet to practice this skill away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- Addition - Whole Number - Doubles
- Addition - Whole Number - Doubles - Column
- Picture Numbers - Adding - Picture to Number (Within 10)
- Ten Groups - Add, Without Carry, Less than 10
- Addition - Whole Number 1 digit + 1 digit, No Carry
Units Teaching This Skill
These adaptive units introduce, teach, or reinforce this skill (Use doubles facts) through scaffolded problems that grow in difficulty as concepts are understood.