Knowledge atom
Fluently add and subtract within 100
Computes any addition or subtraction within 100 accurately and efficiently, selecting among place-value, compensation, and regrouping strategies.
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
2.NBT.B.5
Prerequisites
Common misconceptions
- has one procedure and applies it slowly to every case, including ones where a mental route is obvious
Required evidence
These evidence lanes define what would count toward this atom.
EvidencePerformanceStatusNext step
Show the stepsCarry out the procedure accurately Not startedCollect one observation
Explain the ideaDescribe why the response works Not startedCollect one observation
Recent evidence
No evidence recorded yet
The first response record for this atom will appear here.