Missing number problems worksheets
7 + ___ = 12. Quietly the first algebra a child ever does.
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About missing number problems
A missing number problem looks like arithmetic and behaves like algebra. When a child solves 7 + ___ = 12, they are finding an unknown — the same move they will make with x seven years later.
These are also excellent diagnostics. A child who can do 7 + 5 but stalls on 7 + ___ = 12 has learned a procedure rather than a relationship, and that is worth knowing early.
What actually helps
- Read the blank aloud as 'something': 'seven plus something equals twelve'.
- Let them count up from 7 to 12. Counting up is a legitimate strategy, not cheating.
- Mix the blank's position — sometimes first, sometimes second.
Common questions
Is a missing number problem really algebra?
In substance, yes. It asks a child to find an unknown value that makes a statement true, which is exactly what solving an equation is. Only the notation differs.
My child can add but cannot do missing numbers. Why?
It usually means addition has been learned as a procedure rather than as a relationship between three numbers. Fact families are the usual fix.
Thank you — that genuinely helps.
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