Lesson: The Numbers 21–30 Mathematics

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In this lesson, we will learn how to count from 21 to 30, represent the numbers 21–30 using models, and read and write the numerals 21–30.

Lesson Plan

Students will be able to

  • use models to represent the numbers 21–30,
  • describe the numbers 21–29 as two tens and some ones and the number 30 as three tens,
  • read and write the numerals 21–30,
  • count from 21 to 30.

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