- Aaron Daffern

# 3rd Grade Math - Composing/Decomposing Numbers

Updated: a day ago

This post explains and give practice opportunities related to TEKS 3.2A:

compose and decompose numbers up to 100,000 as a sum of so many ten thousands, so many thousands, so many hundreds, so many tens, and so many ones using objects, pictorial models, and numbers, including expanded notation as appropriate

## Instruction

This is a very dense standard that has two major components. First, we need to understand the output this standard describes, especially expanded notation.

Once expanded notation is introduced and differentiated from expanded form, you can look at composing and decomposing numbers.

Oral Language Development

Between 2016 and 202, this readiness standard has been tested 6 times on the STAAR test. Videos explaining each problem can be found below. If you'd rather take a quiz over these questions, click the classroom.

You can find the Google Slide version __here__. You can also learn more about the Unmute model __here__.

## STAAR Practice

Between 2016 and 2021, this readiness standard has been tested 7 times on the STAAR test. Videos explaining each problem can be found below. If you'd rather take a quiz over these questions, click __here__. The videos below are linked to each question in the quiz as answer explanations after the quiz is submitted.

To view all the posts in this 3rd grade TEKS review series, click __here__.