## Classroom Video: Developing a Conceptual Understanding - Section 1: Hook

Classroom Video: Developing a Conceptual Understanding
Classroom Video: Developing a Conceptual Understanding

# How do I solve a change unknown word problem?

Unit 6: Three-Digit Addition and Subtraction
Lesson 9 of 13

## Big Idea: This lessons starts with a concrete representation of a change unknown problem and then pushes students to think abstractly and develop number sentences to solve change unknown word problems.

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12 teachers like this lesson
Standards:
Subject(s):
Math, Differentiation, Number Sense and Operations, addition, subtraction, Word Problem
50 minutes

### Caitlin Vaughan

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