MathematicsAddition & SubtractionAges 7–8
Addition and subtraction strategies (age 7+)
Explain why addition and subtraction strategies work, using place value and the properties of operations
Learning resources
Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.
No reviewed resources for this concept yet.
The teaching approach above still stands. Curated practice links will appear here as the shelf fills.
Explore the learning path
2 before · 1 after
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Before
This concept
Addition and subtraction strategies (age 7+)Meta concept
Check understanding
- Explain why adding tens and ones separately gives the correct total
- Describe why a compensation strategy works (e.g. 'I added 1 too many, so I subtract 1')
- Use place-value language to justify a written method step by step
“If your child works out '67 + 24' by splitting it into '60 + 20' and '7 + 4', can they explain to you in words *why* that approach gives the right answer?”
Curriculum record
- Type
- Meta
- Subject
- Mathematics
- Domain
- Addition & Subtraction
- Age range
- Ages 7–8
Standards
ccss-math:2.NBT.9