Mathematics·Addition & Subtraction·procedural
Addition and subtraction strategies
Use counting on and counting back as strategies for addition and subtraction
Suggested ages 6–7
Learning journey
Your child is building strong foundations in addition and subtraction — learning to add and subtract numbers fluently within 20, understanding the relationship between these operations, and applying various mental strategies to solve problems.
Evidence of understanding
- Add 8 + 3 by starting at 8 and counting on 3 (9, 10, 11)
- Subtract 12 − 3 by counting back 3 from 12 (11, 10, 9)
- Explain that counting on is a way to add
Assessment prompt
If Addition and subtraction strategies needs to work out '8 + 5', can they start from 8 and count up five more — rather than starting from 1 every time?
Standards alignment
1.OA.5US · ccss-math
Relate counting to addition and subtraction
Common Core State Standards for Mathematics · 1