Using Subtraction to Find Missing Numbers

The video tutorial explains how to determine the number of children who voted for strawberry ice cream using a table of known values for other flavors. The instructor demonstrates two methods: adding known values and subtracting from the total. The preferred method involves step-by-step subtraction, ensuring accuracy and understanding of the process. The tutorial emphasizes the importance of showing work to earn full marks.

How many children voted for strawberry?

What is the total number of children that voted?

Describe the importance of showing your method in calculations.

What method can be used to find out how many children voted for strawberry?

Explain the process of subtracting the known values from the total to find the number of children who voted for strawberry.

What was the final value of children who chose strawberry?

What alternative method could be used to find the number of children who voted for strawberry?