Lesson Plan: Subtracting Ones from Teen Numbers: Number Line Mathematics • 2nd Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to subtract a one-digit number from a teen number using a number line.


Students will be able to

  • break apart the subtrahend in an equation to make 10,
  • model subtraction on a number line:
    • subtract to make 10,
    • subtract the remaining ones,
  • write a subtraction equation showing the subtraction of a one-digit number from a teen number,
  • subtract using labeled number lines and open number lines.


Students should already be familiar with

  • recognizing that a teen number is made from a ten and some ones.


Students will not cover

  • minuends greater than 19.

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