## grid paper in class practice assignment - Section 3: Guiding and Using Student Constructed Notes to Reinforce Learning

grid paper in class practice assignment

# RTI : Using the Lead Number to Estimate Addition and Subtraction

Unit 1: Place Value and Multi-Digit Addition & Subtraction
Lesson 4 of 7

## Big Idea: Students use the concept of a train to understand the lead number and how to estimate using a standard multi-digit algorithm.

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45 minutes

### Mary Ellen Kanthack

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