MAT00.NBT
Domain (NBT)
Number and Operation in Base Ten

Narrative for the (NBT) Number and Operation in Base Ten
Students’ work in the baseten system is intertwined with their work on counting and cardinality, and with the meanings and properties of addition, subtraction, multiplication, and division. Work in the baseten system relies on these meanings and properties, but also contributes to deepening students’ understanding of them.
In Kindergarten, teachers help children lay the foundation for understanding the baseten system by drawing special attention to 10. Children learn to view the whole numbers 11 through 19 as ten ones and some more ones. They decompose 10 into pairs such as 1 9, 2 8, 3 7 and find the number that makes 10 when added to a given number such as 3. Students use objects, math drawings, and equations to describe, explore, and explain how the “teen numbers,” the counting numbers from 11 through 19, are ten ones and some more ones.
Calculation Method for Domains
Domains are larger groups of related standards. The Domain Grade is a calculation of all the related standards. Click on the standard name below each Domain to access the learning targets and rubrics/ proficiency scales for individual standards within the domain. 