Ages 6–7 · Early elementary math · 16 WORKSHEETS
Addition and Subtraction Within 20
Move from calculations within 10 toward addition and subtraction within 20 in short, steady steps.
Why these pages are together
Practice stays brief and consistent instead of adding a large number of problems at once.
- Learning goals
- calculation within 10 · extending to 20 · checking a calculation process
- Curriculum reference
- Referenced to Korea's 2022 Elementary Mathematics Curriculum
Connects to early elementary numbers and operations; unit order can vary by textbook. This is a reference, not government approval or a claim of textbook equivalence.
READY TO PRINT
Worksheets in this path
WORKING TOGETHER
A few helpful cues
- Confirm that math within 10 feels comfortable first.
- Use only as many problems as the child can focus on.
- Check the answer sheet after the work is finished.
COMMON QUESTIONS
Before you begin
Is finger counting okay?
Yes. Concrete strategies can gradually become mental strategies.
What if math within 20 feels too hard?
Return to number bonds and calculations within 10 for a while.