Mathematics
Addition & Subtraction
Procedural
6–7 yrs
Unknown in Addition & Subtraction
加减法中的未知数
Description
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers
Mastery Evidence
- Solve 8 + ? = 11 and write 3
- Solve 5 = □ − 3 and write 8
- Solve 6 + 6 = □ and write 12
Assessment Prompt
If your child sees '? + 6 = 14' or '9 − ? = 4' written on paper, can they figure out what number goes in the gap?
