Grade 2 Mathematics Module 4, Topic A, Lesson 3

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Objective: Add and subtract multiples of 10 and some ones within 100.

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Common Core Learning Standards

CCLS State Standard
2.NBT.8 Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given...
2.NBT.9 Explain why addition and subtraction strategies work, using place value and the properties of...

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