Knowledge atom
Solve three-addend word problems within 20
Solves a situation combining three quantities and writes a matching equation.
Start practiceProgress & proof summary
LifecycleNot started
Evidence progress0 of 2 pieces collected
0%Current predictionNo prediction yet
Why?Next reviewNot scheduled
Mastery projection: Not available yetWhat does this mean?
Standards alignment
1.OA.A.2
Prerequisites
Common misconceptions
- adds only two of the three quantities
Required evidence
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
Represent itShow the idea with a model or notation Not startedCollect one observation
Recent evidence
No evidence recorded yet
The first response record for this atom will appear here.