Missing number problems (age 7+)
Mathematics · Addition & Subtraction · procedural
Solve addition and subtraction problems including missing-number problems, using number facts, place value, and more complex methods
What mastery looks like
- Solve a missing-number problem such as 245 + ? = 380
- Choose an appropriate method (mental, written, or combination) based on the numbers
- Solve multi-step problems combining addition and subtraction of three-digit numbers
Check your understanding
Can Missing number problems (age 7+) work out sums with a hidden number — like '? − 38 = 24' or '53 + ? = 91' — by thinking carefully about what the equation is asking?
Prerequisites
Required first
Helpful