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SUBJECTNEST · YEAR 2 MATHEMATICS · WEEKS 9–10 · home-47
H07 · A trade that keeps the amount
Try together: Model34 as3 tens4 ones; exchange one ten for10 ones:2 tens14 ones. Child
chooses a different ordinary value and checks its total. Paper marks/words suffice; no
money purchase or small-piece handling.
What this practises: Value-preserving partition. Keep actual child choices and adult
handling/help separate. A few minutes or one question can be enough. No purchase, public
sharing, personal information or returned activity is required.
Back to the family menu (README.md) or the matching Day47 (../days/day-47.md).
Original SubjectNest educational material ©2026 SubjectNest contributors. CC BY4.0; full
portable conditions and outside exceptions: notice (../legal/NOTICE.md).
SubjectNest / NeuroForge 2026 · Original expression CC BY 4.0; separate terms accompany.
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# H07 · A trade that keeps the amount

**Try together:** Model34 as3 tens4 ones; exchange one ten for10 ones:2 tens14 ones. Child chooses a different ordinary value and checks its total. Paper marks/words suffice; no money purchase or small-piece handling.

**What this practises:** Value-preserving partition. Keep actual child choices and adult handling/help separate. A few minutes or one question can be enough. No purchase, public sharing, personal information or returned activity is required.

Back to the [family menu](README.md) or the [matching Day47](../days/day-47.md).

Original SubjectNest educational material ©2026 SubjectNest contributors. CC BY4.0; full portable conditions and outside exceptions: [notice](../legal/NOTICE.md).