Enrich · Stage 5 · Numbers of any magnitude

Enrich Examine the effect that truncating or rounding during calculations has on the accuracy of the results

Extension and enrichment for students who are ready to go deeper: rich tasks, problem solving and open-ended challenges.

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  Estimation 180
  Estimation 180 (Andrew Stadel) · Interactive (browser) · Free · Link checked 2026-10-15 · No prep
  Use it for: Daily estimation challenges to build number sense and reasoning about approximations.