Assess the reasonableness of an answer using estimation

G3.OA.20Grade 3OperationsSource mission: Multistep Problem Solving

Uses rounding and mental computation to judge whether a computed answer is plausible.

Progress & proof summary

LifecycleNot started

Evidence progress0 of 2 pieces collected

Current predictionNo prediction yet

Next reviewNot scheduled

Mastery projection: Not available yetWhat does this mean?

3.OA.D.8 3.NBT.A.1

These evidence lanes define what would count toward this atom.

EvidencePerformanceStatusNext step

Explain the ideaDescribe why the response works Not startedCollect one observation

Tell it apartDistinguish the target from a near miss Not startedCollect one observation

No evidence recorded yet

The first response record for this atom will appear here.

Recommended next step

Use one focused task to begin collecting evidence for this atom.

Explain the idea

Uses rounding and mental computation to judge whether a computed answer is plausible.

Estimated time: ~5 min