Missing Addend Worksheet Generator
Pick a largest sum below to generate a fresh, printable set of missing addend practice problems.
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A missing addend problem is an addition sentence with one number hidden; the addition generator drills the same sentences with all three numbers shown.
Addition Worksheet Generator →Number bonds are the same part-part-whole idea without the algebra framing, so they're a gentler starting point before a number goes missing.
Number Bonds Worksheet Generator →
Frequently Asked Questions
What is a missing addend problem?
A missing addend problem gives you two of the three numbers in an addition sentence (the two addends and the sum) and asks for the third — for example, 5 + __ = 9.
Why randomize which number is missing?
If the blank is always in the same spot, kids can pattern-match the worksheet format instead of actually solving. Randomizing which number is missing (first addend, second addend, or the sum) forces real problem-solving each time.
How does this connect to algebra later on?
Missing addend problems are literally the same structure as a simple algebra equation (a + x = c) — this is the earliest, most concrete version of solving for an unknown.