Knowledge atom
Solve take-from, change-unknown word problems within 20
Given a start amount and what remains, finds how many were removed.
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.1 1.OA.D.8
Prerequisites
Common misconceptions
- subtracts in the order given regardless of which quantity is missing
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.