Unknown in Addition & Subtraction
Mathematics · Addition & Subtraction · procedural
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers
What mastery looks like
- Solve 8 + ? = 11 and write 3
- Solve 5 = □ − 3 and write 8
- Solve 6 + 6 = □ and write 12
Check your understanding
If Unknown in Addition & Subtraction sees '? + 6 = 14' or '9 − ? = 4' written on paper, can they figure out what number goes in the gap?
Prerequisites
Required first
Helpful