Numbers 10-20, Counting to 100
Unit description: In this unit, students will learn to count to 100 by ones and tens. They will compose and decompose numbers in the teens into tens and ones. They will represent and write numbers with their quantities up to 20.
Essential Outcomes of the Unit
Counting and Cardinality- Know number names and the count sequence.
NY-K.CC.1 Count to 100 by ones and by tens.
NY-K.CC.3 Write numbers from 0 to 20. Represent a number of objects with a written numeral 0-20 (with 0 representing a count of no objects).
Counting and Cardinality- Count to tell the number of objects
NY-K.CC.4 Understand the relationship between numbers and quantities up to 20; connect counting to cardinality.
Other Standards Addressed in the Unit
Counting and Cardinality- Know number names and the count sequence.
NY-K.CC.2 Count to 100 by ones beginning from any given number (instead of beginning at 1).
Number and Operations in Base Ten- Work with numbers 11–19 to gain foundations for place value.
NY-K.NBT.1 Compose and decompose the numbers from 11 to 19 into ten ones and one, two, three, four, five, six, seven, eight, or nine ones
Essential Questions and Big Ideas
How are teen numbers composed and decomposed?
- Knowledge of smaller numbers (combinations to 5, combinations to 10) and counting to 10, lead to decompose teen numbers as “ten and some more ones”
- Teen numbers can be composed and decomposed by using objects or drawings, and recording each by a drawing or equation.
What is significant about the teen numbers?
- Teen numbers are composed of a group of ten and some more.
- Understanding teen numbers lays a foundation for place value.
How can you use 0-10 to predict other counting sequences?
- Knowledge of numbers 0-10 are applied to count and represent numbers up to 20.
- Apply knowledge of numbers 0-10 to predict order and sequence higher numbers (10-20, 20-30, etc), including counting to 100.
- Understand that each successive number name refers to a quantity that is one larger.
Download the complete Kindergarten Math Unit 4 framework to customize for your own planning.