# B-FIRST — given source: complete description

The source gives 4 ten-strips, each drawn with ten distinct cells, and 6 loose circle marks. Labels give strip and single counts, not their computed whole. No opened-ten answer is drawn. A blank own exchange region follows.

[Original SVG](../aids/b-first-source.svg). Use suitable tactile/large pieces or directed adult movement if useful. A supplied account is a model, not an independently created answer.

Original SubjectNest teaching and drawings © NeuroForgeIO Pty Ltd 2026, [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Credit SubjectNest by NeuroForgeIO Pty Ltd, version 0.1.0, source and licence; note changes. Curriculum and provider rights remain separate.