one less

Comparing Numbers
One Less

Identify numerical values, compare numbers by finding one less, and order numbers in ascending and descending sequences with this interactive unit.

Target Age:

Lesson Overview

By the end of this unit, students will be able to:

  1. identify and recognize numerical values and their corresponding quantities;
  2. compare numbers by identifying the number that is one less than a given number;
  3. order numbers in ascending and descending sequences, emphasizing the concept of “one less.”

 

Curriculum Alignment: Year 1 Number: Number and Place Value

  • Count to and across 100, forwards and backwards, beginning with zero or 1, or from any given number.
  • Identify and represent numbers using objects and pictorial representations including the number line, and use the language of: equal to, more than, less than (fewer), most, least.
Last updated on: February 18, 2026

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