## Apply properties of operations as strategies to add and subtract. Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)

23 Lesson(s)

Gilbert, IA
Environment: Rural

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### Commutative Property: First Grade Style

Oklahoma City, OK
Environment: Urban

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### Identify Related Facts - Day 1 of 2

Lakeland, FL
Environment: Urban

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### Using 3 or More Addends to Make a Meal

Gilbert, IA
Environment: Rural

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### Crayon Box Combinations

New Orleans, LA
Environment: Urban

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### Peas and Carrots...Carrots and Peas

New Orleans, LA
Environment: Urban

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Reflections (1)

### Identify Related Facts - Day 2 of 2

Lakeland, FL
Environment: Urban

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### 10 and Some More

1st Grade Math » Unit: Complements of 10 and 20
1st Grade Math » Unit: Complements of 10 and 20
Waitsfield, VT
Environment: Suburban

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### 12 Apples and Bananas

1st Grade Math » Unit: The Number 10 and the Addition and Subtraction Concept
1st Grade Math » Unit: The Number 10 and the Addition and Subtraction Concept
Waitsfield, VT
Environment: Suburban

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### Recording Related Facts

Lakeland, FL
Environment: Urban

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### Flip Flop

New Orleans, LA
Environment: Urban

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#### Students explore the Commutative Property and learn why you can "flip flop" the addends and still get the same answer!

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1st Grade Math » Unit: Word Problems
Oklahoma City, OK
Environment: Urban

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### 4 Square Fact or Fiction

New Orleans, LA
Environment: Urban

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### Keep it Simple

New Orleans, LA
Environment: Urban

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Reflections (1)

### Complements of 10

1st Grade Math » Unit: The Number 10 and the Addition and Subtraction Concept
1st Grade Math » Unit: The Number 10 and the Addition and Subtraction Concept
Waitsfield, VT
Environment: Suburban

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Standards:

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Reflections (1)
Common Core Math