CCSS.Math.Content.2.NBT.B.9

4 +(3+5) = (5+3) + 4

• Associative
• Commutative
• Identity

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CCSS.Math.Content.2.NBT.B.9

1 + (8+3) = (1 + 8) + 3

• Associative
• Commutative
• Identity

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CCSS.Math.Content.2.NBT.B.9

What property of addition takes a whole number and adds it with zero?

• Associative
• Commutative
• Identity

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CCSS.Math.Content.2.NBT.B.9

2 + 5 + 6 = 6 + 2 + 5

• Associative
• Commutative
• Identity

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CCSS.Math.Content.2.NBT.B.9

What property of addition do the numbers HAVE to stay in the same order, but the numbers and groups can change?

• Associative
• Commutative
• Identity

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CCSS.Math.Content.2.NBT.B.9

3 + 9 + 2 = 3 + 11

• Associative
• Commutative
• Identity

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CCSS.Math.Content.2.NBT.B.9

What property of addition can change order, but stay the same? Hint: looks like a mirror

• Associative
• Commutative
• Identity

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CCSS.Math.Content.2.NBT.B.9

2 + 8 = 8 + 2

• Associative 
• Commutative
• Identity

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CCSS.Math.Content.2.NBT.B.9

Is 5 + 15 = 15 + 5 ?

• Yes

• No

• May be

• Not determined

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CCSS.Math.Content.2.NBT.B.9

Does addition make a number bigger or smaller

• bigger

• smaller

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CCSS.Math.Content.2.NBT.B.9