Breaking Down Numbers Worksheet
This breaking down numbers worksheet has 1st graders sort twelve addition facts by the sum they make and finish three missing-number equations. An answer key is included for quick checking.
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About this resource
Description
Every number can be broken into smaller parts, and seeing those parts is the key to fast, flexible addition. This breaking down numbers worksheet helps first graders see the different pairs of numbers that make 5, 6, 7, and 8. When children know that 8 can be 4 and 4, 5 and 3, or 6 and 2, they add with more confidence and start to build real fact fluency.
About This Worksheet
At the top, students read a box of twelve addition facts. They find the sum of each one and write the fact on a line under the number it makes: 5, 6, 7, or 8. Each number has exactly three facts, so children can check their own work when every column is full. In the second part, students write the missing number to finish three equations, including two that use zero. It is a great 1st grade addition worksheet for math centers, morning work, homework, or a quick check after a lesson on number pairs.
What’s Included
- A sorting activity with twelve addition facts and four sum columns
- Three missing-number equations within 10
- An answer key on the second page
- A printable PDF that is ready to copy
Why It Helps Kids Learn
First, sorting facts by their sum shows children that one number can be made in many ways, which is the heart of decomposing numbers. Second, writing each fact again gives extra practice with addition within 10 without feeling like a drill. Third, the missing-number equations stretch students to think about parts and wholes in both directions, which gets them ready for subtraction.
Ideas for Teachers and Parents
Before the page, give children eight counters and ask them to split the pile into two groups in as many ways as they can. After they finish, have students choose one column and build each fact with blocks or fingers to prove it. You can also ask children to find a fourth way to make each number and add it to the bottom of the column. Use this breaking down numbers worksheet again later in the year as a fluency review.
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