Exploring Input-Output Relationships in 3rd Grade Math

This video tutorial explores the concept of relationships in third-grade math using input-output tables. It begins with an example of students buying candy, where the cost is determined by subtracting the change from the amount given. The tutorial then shifts to a scenario involving remote-control cars and batteries, demonstrating how to find the relationship between the number of cars and the required batteries using multiplication. The video emphasizes understanding relationships by analyzing data across columns and rows.

What is the main focus of the video tutorial?

• Studying the history of remote-control cars

• Exploring different types of candies

• Learning about relationships in input-output tables

• Understanding multiplication tables

What are the students trying to buy in the first scenario?

• Candy

• Books

• Stationery

• Toys

How do we determine the cost of the candy?

• By multiplying the given amount by the change

• By subtracting the change from the given amount

• By adding the given amount and the change

• By dividing the given amount by the change

What is the cost of the candy if a student gives 80 cents and receives 55 cents as change?

• 15 cents

• 35 cents

• 25 cents

• 45 cents

Which of the following verifies the cost of the candy?

• 80 - 20 = 60

• 70 - 25 = 45

• 75 - 30 = 45

• 90 - 25 = 65

In the second scenario, what are the two items being compared?

• Books and pens

• Remote-control cars and double-A batteries

• Toys and games

• Candies and chocolates

How many batteries are needed for 7 remote-control cars?

• 10

• 25

• 15

• 35

What is the relationship between the number of remote-control cars and the batteries?

• Each car requires 5 batteries

• Each car requires 6 batteries

• Each car requires 4 batteries

• Each car requires 3 batteries

If you have 2 remote-control cars, how many batteries do you need?

• 15

• 20

• 10

• 5

What mathematical operation helps determine the number of batteries needed for the cars?

• Division

• Subtraction

• Multiplication

• Addition