Missing Addend: Find the Missing Numbers
Our missing addend worksheets help kids practice algebraic thinking by finding the number that completes an addition equation, like 4 + ___ = 9. These worksheets are a great next step after kids know their single digit addition facts, and they also help show how addition and subtraction are connected. You can download and print them.
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Missing Addend - #3
Find the Missing Addend
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Find Missing Addend
Once your child is comfortable finding a missing addend, try mixing in addition and subtraction practice, which builds on the same number-relationship thinking these worksheets introduce.
Missing Addend Worksheets FAQ
What is a missing addend?
A missing addend is the unknown number in an addition equation, usually shown as a blank or box (e.g., 4 + ___ = 9). Finding it requires working backward from the sum, which builds early algebraic thinking.
When should kids start missing addend problems?
Most kids are ready for missing addend problems once they're confident with basic addition facts, typically in 1st or 2nd grade. It's a good way to check whether a child truly understands addition, rather than just memorizing number combinations.
How does finding a missing addend relate to subtraction?
Solving 4 + ___ = 9 is mathematically the same as solving 9 − 4 = ___. Missing addend practice helps kids see this connection, which builds a stronger foundation for subtraction and later algebra.
