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Common CoreCCSS.Math.Content.1.NBT.2CCSS-2010

Understand that the two digits of a two-digit number represent amounts of tens and ones

Common Core·math·Grade 1·Bloom: Understand·Last verified: May 21, 2026

Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

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Skills that teach this standard (4)

1 with free practice questions
A Ten Is Ten Ones →
Number Representation & Place Value · Ages 6–7 · try 3 free questions
The teen numbers
Number Representation & Place Value · Ages 5–7 · questions coming soon
The multiples of 10
Number Representation & Place Value · Ages 6–7 · questions coming soon
The two digits of a two-digit number
Number Representation & Place Value · Ages 6–7 · questions coming soon

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