Solve put-together, both-addends-unknown word problems

G1.OA.17Grade 1OperationsSource mission: Part–Whole Stories

Given a total in a put-together or take-apart situation, finds two unknown parts that compose the stated whole.

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?

K.OA.A.2 1.OA.A.1

treats the two unknown parts as unrecoverable even when a valid pair only needs to compose the stated whole

These evidence lanes define what would count toward this atom.

EvidencePerformanceStatusNext step

Apply the ideaUse the idea in a new situation Not startedCollect one observation

Explain the ideaDescribe why the response works 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.

Apply the idea

Given a total in a put-together or take-apart situation, finds two unknown parts that compose the stated whole.

Estimated time: ~5 min