© 2026 Maths ModelledYear 5 · Place value · 1:21 · Reasoning extension
Start with 303,030 on a Gattegno chart and organise every total from two specified moves of different counters.
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Use Build mode, from Hundred thousands to Ones. Build 303,030, move the greatest counter one column left or right, then a different counter two columns left or right. Record all eight totals.
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