MathematicsAddition & SubtractionAges 7–8
Mentally adding hundreds to 3-digit numbers
Mentally add and subtract a three-digit number and hundreds
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.
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This concept
Mentally adding hundreds to 3-digit numbersProcedural concept
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Check understanding
- Calculate 345 + 200 mentally
- Calculate 762 − 400 mentally
- Explain that only the hundreds digit changes
“Can your child quickly work out '342 + 200' or '756 − 300' in their head — knowing that only the hundreds digit changes?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Addition & Subtraction
- Age range
- Ages 7–8
Standards
uk-nc-2013:Ma/KS2/Y3/AS/1c