## 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)

1st Grade Math » Unit: Problem Solving Addition
1st Grade Math » Unit: Problem Solving Addition
Gilbert, IA
Environment: Rural

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Resources (15)

Reflections (1)

### Commutative Property: First Grade Style

1st Grade Math » Unit: Understanding Addition
1st Grade Math » Unit: Understanding Addition
Oklahoma City, OK
Environment: Urban

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Resources (16)

Reflections (1)

### Identify Related Facts - Day 1 of 2

1st Grade Math » Unit: Single Digit Addition and Subtraction
1st Grade Math » Unit: Single Digit Addition and Subtraction
Lakeland, FL
Environment: Urban

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Favorites (28)

Resources (12)

Reflections (1)

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

1st Grade Math » Unit: Problem Solving Addition
1st Grade Math » Unit: Problem Solving Addition
Gilbert, IA
Environment: Rural

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Favorites (12)

Resources (14)

Reflections (1)

### Crayon Box Combinations

1st Grade Math » Unit: Properties of Addition and Subtraction
1st Grade Math » Unit: Properties of Addition and Subtraction
New Orleans, LA
Environment: Urban

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Resources (15)

Reflections (1)

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

1st Grade Math » Unit: Properties of Addition and Subtraction
1st Grade Math » Unit: Properties of Addition and Subtraction
New Orleans, LA
Environment: Urban

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Favorites (9)

Resources (15)

Reflections (1)

### Identify Related Facts - Day 2 of 2

1st Grade Math » Unit: Single Digit Addition and Subtraction
1st Grade Math » Unit: Single Digit Addition and Subtraction
Lakeland, FL
Environment: Urban

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Resources (12)

Reflections (1)

### 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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Resources (20)

Reflections (1)

### 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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Favorites (5)

Resources (18)

Reflections (1)

### Recording Related Facts

1st Grade Math » Unit: Single Digit Addition and Subtraction
1st Grade Math » Unit: Single Digit Addition and Subtraction
Lakeland, FL
Environment: Urban

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Resources (16)

Reflections (1)

### Flip Flop

1st Grade Math » Unit: Properties of Addition and Subtraction
1st Grade Math » Unit: Properties of Addition and Subtraction
New Orleans, LA
Environment: Urban

Big Idea:

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

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Favorites (6)

Resources (14)

Reflections (1)

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

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Resources (17)

Reflections (2)

### 4 Square Fact or Fiction

1st Grade Math » Unit: Solving 3 Addend Problems
1st Grade Math » Unit: Solving 3 Addend Problems
New Orleans, LA
Environment: Urban

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Resources (17)

Reflections (2)

### 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:

Favorites (2)

Resources (24)

Reflections (1)

### Keep it Simple

1st Grade Math » Unit: Solving 3 Addend Problems
1st Grade Math » Unit: Solving 3 Addend Problems
New Orleans, LA
Environment: Urban

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Standards:

Favorites (11)

Resources (14)

Reflections (1)
Common Core Math