Properties of Addition and Mental Math

The video tutorial explores how to identify addition patterns by examining sums of numbers in a red square. It demonstrates using various strategies, such as the associative and commutative properties, mental math, and breaking apart numbers, to find sums. The tutorial highlights that the sums of purple and green numbers are equal and form a pattern, and these sums are double the middle number in the red square.

What is the first step Helen takes to find addition patterns?

• She subtracts the numbers.

• She multiplies the numbers.

• She divides the numbers.

• She finds the sum of the purple numbers.

What property is used to rearrange numbers in addition?

• Identity Property

• Associative Property

• Commutative Property

• Distributive Property

What is the result of using the associative property on 44 + 48?

• 44 + 48 = 90

• 44 + 48 = 46 + 46

• 44 + 48 = 50 + 42

• 44 + 48 = 92

How does Helen use mental math to simplify addition?

• By multiplying both numbers by two.

• By adding and subtracting the same number.

• By dividing both numbers by two.

• By subtracting the smaller number from the larger one.

What is the result of using mental math on 44 and 48?

• 44 + 48 = 92

• 44 + 48 = 50 + 42

• 44 + 48 = 90

• 44 + 48 = 46 + 46

What strategy can be used to find sums besides breaking apart numbers?

• Using multiplication

• Using division

• Using subtraction

• Using mental math

What is the purpose of breaking apart numbers in addition?

• To change their values.

• To find their differences.

• To make them easier to add.

• To make them harder to add.

Which property allows rearranging addends in addition?

• Associative Property

• Commutative Property

• Distributive Property

• Identity Property

Which property is used to break up numbers for easier addition?

• Distributive Property

• Commutative Property

• Associative Property

• Identity Property

What is the sum of the purple numbers?

• 96

• 94

• 92

• 90