Mathematics (2019) Grade(s): KG

MA19.K.14

Compose and decompose numbers from 11 to 19 by using concrete objects or drawings to demonstrate understanding that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.

Unpacked Content

Knowledge

Students know:
  • the number sequence to 19.
  • Strategies to decompose a number into tens and ones.

Skills

Students are able to:
  • Use objects to compose and decompose numbers.

Understanding

Students understand that:
  • ten things can be represented as one ten or as ten ones.

Vocabulary

  • Compose
  • Decompose
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