Expanded Form Addition By Lukus
[1,844 views]
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This strategy is wonderful because you can solve three digit addition problems in your head!
456
+521
Step 1: Write the number in expanded form
... ...
456
+521
Step 1: Write the number in expanded form
... ...
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Standards
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Content Area: Mathematics ● Subject: Grade 2 ● Category: Number & Operations in Base Ten
Skill: NBT.2.9 Use place value understanding and properties of operations to add and subtract. 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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