tens to nines word prob1.docx - Section 1: Warm Up

 
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From Tens to Nines

Unit 2: Adding and Subtracting the Basics
Lesson 12 of 18

Objective: SWBAT add or subtract nine from a number less than 50 by first adding or subtracting ten and then changing the answer by one.

Big Idea: Fluency in adding and subtracting is expected during second grade. New strategies to add and subtract efficiently provide students with a variety of options to increase fluency.

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