SubjectNest · Work it out. Make a useful note.

Year 4 Mathematics · Term 2 · Resource weeks 11–12 · sequence days 51–60

Add an extra, then remove it · complete text alternative

Role

Adult ordinary model; exposed solution separate from genuine blank own work

Complete source

Day 53 ordinary 398+267 sticker source.

Full alternative

An adult exact-compensation model. Fictional 398 and 267 stickers total 665. Replacing 398 with 400 adds two extra, gives 667, then removing those extra two yields 665. A separate estimate 400+300≈700 checks scale; it is not the exact total.

Rights

Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

Status

Original SVG and PNG constructed in this source candidate. Preserved brief predates construction; different whole source/art and Root Browser acceptance remain pending.