## 3 Digit Addition Split - Section 2: Active Enagagement

3 Digit Addition Split
3 Digit Addition Split

# Adding 3 Digits to 3 Digits Using Expanded Form

Unit 9: Place Value
Lesson 4 of 10

## Big Idea: Decomposing a large number into its expanded form is helpful in strengthening one's mental math ability. This lesson is designed to give the students practice in using this important strategy.

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Standards:
Subject(s):
Math, Place Value, Number Sense and Operations, sum, expanded notation, ones, ten, hundreds, addends, addition
50 minutes

### Michelle Marcus

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