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←MathGrade 1Operations

Knowledge atom

Solve take-from, result-unknown word problems

G1.OA.12Grade 1OperationsSource mission: Change Stories

Given a start amount and an amount removed, finds how many remain.

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Progress & 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

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

Prerequisites

Common misconceptions

  • writes the numbers in story order even when that reverses the subtraction

Required evidence

These evidence lanes define what would count toward this atom.

i
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.

Recommended next step

Start a short practice

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

Apply the idea

Given a start amount and an amount removed, finds how many remain.

Estimated time: ~5 min

Start this practice