Finding Missing Addends and Subtraction

The video tutorial introduces the concept of missing addends, explaining that addends are numbers used to find a sum. It presents two strategies to find missing addends: counting on a number line and using subtraction (flip around strategy). The tutorial includes practice problems to demonstrate these methods, encouraging students to think like detectives to find the mystery number. The video concludes with a recap and encouragement to apply these strategies.

What is an addend in an addition equation?

• The difference between two numbers

• The result of the addition

• A number that is added to another

• A number that is subtracted

In the equation 2 + _ = 7, what is the missing number called?

• Addend

• Difference

• Sum

• Product

What is the first strategy introduced to find the missing addend?

• Counting on using a number line

• Using multiplication

• Using division

• Guessing the number

How many hops are needed to go from 2 to 7 on a number line?

• 3

• 4

• 5

• 6

What is the sum in the equation 2 + 5 = 7?

• 2

• 9

• 5

• 7

What is the second strategy introduced to find the missing addend?

• Using subtraction

• Guessing the number

• Using multiplication

• Counting on using a number line

In the equation 7 - 2, what is the result?

• 4

• 6

• 5

• 3

Which strategy can be used to verify the result of counting on?

• Using addition

• Using multiplication

• Using subtraction

• Using division

What is the missing addend in the equation 3 + _ = 8?

• 4

• 7

• 5

• 6

What is the result of 8 - 3?

• 4

• 5

• 6

• 7