Explain addition using the commutative and associative properties

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Explain addition using the commutative and associative properties • In this lesson you will learn how to explain addition by using the commutative and associative properties. • ADDITIONAL MATERIALS • Lesson slides https://docs.google.com/presentation/... • STANDARDS • CCSS.2.NBT.B.9 Explain why addition and subtraction strategies work, using place value and the properties of operations. Explanations may be supported by drawings or objects.

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