Commutative Property and Addition Concepts

The video tutorial explains the commutative property of addition, demonstrating how numbers can be added in any order to achieve the same sum. It covers fact families, showing how addition and subtraction equations are related. A real-life example with cookies illustrates the concept, emphasizing that the order of addends doesn't affect the sum. The tutorial also warns against applying the commutative property to subtraction, explaining why it doesn't work. Finally, it shows how to solve for unknown addends using the commutative property.

What is the commutative property primarily used for in mathematics?

• Reordering numbers in addition

• Solving multiplication problems

• Finding the difference in subtraction

• Calculating division

Which of the following is a correct addition equation from the fact family of 5, 8, and 13?

• 13 - 5 = 9

• 5 + 8 = 12

• 8 + 5 = 13

• 5 - 8 = -3

In a fact family, which operation is NOT typically included?

• Division

• Multiplication

• Subtraction

• Addition

In the cookie example, how many cookies do both you and your sister end up with?

• 8 cookies

• 7 cookies

• 5 cookies

• 6 cookies

How can the commutative property help in solving the equation 18 + 7 + 12?

• By multiplying all numbers

• By dividing 18 by 7

• By reordering to add 18 and 12 first

• By subtracting 7 from 18

What is the sum of 18 and 12 when using the commutative property?

• 20

• 30

• 35

• 25

Why does the commutative property not apply to subtraction?

• Because it only applies to multiplication

• Because it results in a negative number when order is changed

• Because subtraction is not a mathematical operation

• Because subtraction is always zero

What is the result of 235 + 180 using the commutative property?

• 415

• 180 + 235

• 235 - 180

• 180 - 235

Which of the following is NOT a property of addition?

• Associative property

• Distributive property

• Commutative property

• Subtractive property

What is a common mistake when applying the commutative property?

• Applying it to addition

• Using it for division

• Applying it to subtraction

• Using it for multiplication