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Small puzzles. Shared discoveries.
Question a mistake, solve a mission together, or see a familiar skill somewhere new.
Structured recipe · no student information
Start a teacher remix
Change the practice stage or fresh variation above. Save a private copy, then choose whether to publish the generated recipe.
27 + 15 = 32. I added the ones and forgot their extra ten.
7 + 5 = 12 ones. Exchange 10 ones for 1 ten, then add the tens: 27 + 15 = 42.
This version practises regrouping at ages 7-9. Each copy preserves its source link. Public pages contain generated practice only; account details and private notes are never published.
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Original rule-based practice · Variation 42. Age bands are guidance. Review suitability before teaching. Public links contain generation settings only, never learner progress.