Understanding the Commutative Law of Addition

The video tutorial explains the commutative law of addition, which states that the order of numbers in addition does not affect the sum. It demonstrates this concept using the expression 5 + 8 + 5, showing that rearranging the numbers still results in the same sum of 18. The tutorial verifies the results through different calculations, emphasizing that the commutative law simplifies addition by allowing flexibility in the order of numbers.

What is the main idea behind the commutative law of addition?

• Subtraction is the same as addition.

• The order of numbers affects the sum.

• The order of numbers does not affect the sum.

• Addition is only possible with two numbers.

Which of the following is a correct rearrangement of 5 + 8 + 5 using the commutative law?

• 5 + 5 + 10

• 5 + 8 + 8

• 8 + 8 + 5

• 8 + 5 + 5

If you start with 5 and add 8, what is the next step to verify the sum using the commutative law?

• Add 10

• Add 5

• Multiply by 2

• Subtract 8

What is the sum of 5 + 5 + 8?

• 18

• 15

• 13

• 20

How does the commutative law help in simplifying calculations?

• By changing the numbers

• By allowing subtraction

• By rearranging numbers for easier addition

• By using multiplication

Which of the following expressions is equivalent to 8 + 5 + 5?

• 5 + 5 + 8

• 8 + 8 + 5

• 5 + 8 + 8

• 5 + 5 + 10

What is the sum of 8 + 5 + 5?

• 18

• 13

• 20

• 15

Why is the commutative law important in mathematics?

• It allows for subtraction of numbers.

• It simplifies the process of addition by allowing flexibility in the order of numbers.

• It is only applicable to multiplication.

• It changes the value of the sum.