Properties of Addition and Sums

The video tutorial introduces the concept of addition with sums up to 18, using a story about picking apples to illustrate the process. It explains the terms 'addends' and 'sum' and demonstrates both vertical and horizontal addition. The tutorial covers the identity, commutative, and associative properties of addition, providing examples for each. The lesson concludes with a recap of these properties and their application in solving addition problems.

What is the main topic of the lesson?

• Adding numbers with sums up to 18

• Subtracting numbers up to 18

• Dividing numbers up to 18

• Multiplying numbers up to 18

In the story, how many apples did Chad and Janet pick together?

• 18 apples

• 15 apples

• 10 apples

• 20 apples

What is the term for numbers that are added together?

• Addends

• Factors

• Multiples

• Divisors

What is the result of an addition called?

• Quotient

• Difference

• Sum

• Product

What is the sum of 9 + 9?

• 16

• 19

• 17

• 18

What does the identity property of addition state?

• Adding zero to a number gives the number itself

• Grouping addends differently changes the sum

• Changing the order of addends changes the sum

• Adding one to a number gives the number itself

Which of the following is an example of the identity property?

• 9 + 0 = 9

• 9 + 9 = 18

• 9 + 2 = 11

• 9 + 1 = 10

If you add zero to a number, what will the result be?

• Zero

• The number itself

• One

• The number plus one

What is the sum of 18 + 0?

• 16

• 17

• 18

• 19

What is the sum of 0 + 18?

• 19

• 18

• 17

• 16