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←MathGrade 1Place Value

Knowledge atom

Understand decade numbers as tens with zero ones

G1.NBT.07Grade 1Place ValueSource mission: Two-Digit Place Value

Knows that 10, 20, 30 ... 90 name whole numbers of tens with no leftover ones.

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Evidence progress0 of 2 pieces collected
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Standards alignment

1.NBT.B.2c

Prerequisites

Common misconceptions

  • treats the 0 as meaningless rather than as 'zero ones'

Required evidence

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i
EvidencePerformanceStatusNext step
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Explain the ideaDescribe why the response works Not startedCollect one observation

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Knows that 10, 20, 30 ... 90 name whole numbers of tens with no leftover ones.

Estimated time: ~5 min

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