Mathematics (2019) Grade(s): 1

MA19.1.11

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

Unpacked Content

Knowledge

Students know:
  • how to decompose numbers 11-19.

Skills

Students are able to:
  • Use place value models or mental strategies to decompose numbers.

Understanding

Students understand that:
  • a two-digit number represents amounts of tens and ones.
  • Ten things can be represented as one ten or as ten ones.

Vocabulary

  • Base ten
  • Decompose
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