Knowledge atom
Subtract a multiple of ten from a multiple of ten
Subtracts decade numbers within 100 by reasoning about counts of tens.
Start practiceProgress & proof summary
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Evidence progress0 of 2 pieces collected
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Standards alignment
1.NBT.C.6
Prerequisites
Common misconceptions
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Required evidence
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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
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The first response record for this atom will appear here.