Comparing Numbers: One Less

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.