Estimation Techniques in Mathematics

The video tutorial explains how to estimate the number of people who took photos with their phones based on survey data. It introduces the concept of friendly numbers to simplify calculations and demonstrates how to apply estimation techniques to solve the problem. The tutorial concludes with an approximate result of 30,000 people taking photos with their phones.

What was the initial number of people who took photos with a camera?

• 15,000

• 2,138

• 30,000

• 2,000

How many times more people took photos with their phones compared to cameras?

• 20 times

• 15 times

• 5 times

• 10 times

What is the purpose of using friendly numbers in estimation?

• To increase accuracy

• To avoid using paper

• To simplify arithmetic operations

• To make calculations more complex

Which number was considered reasonably friendly in the estimation process?

• 30,000

• 2,000

• 2,138

• 15

What are the possible numbers to which 2,138 could be rounded?

• 2,300 and 2,100

• 2,150 and 2,050

• 2,200 and 2,000

• 2,140 and 2,100

Why was 2,000 chosen as the number to multiply by 15?

• It is the exact number of people

• It simplifies the multiplication

• It is closer to 2,138

• It is a random choice

What is the result of multiplying 2,000 by 15?

• 35,000

• 30,000

• 25,000

• 20,000

What does the squiggly equal sign represent in the calculation?

• Exact equality

• Approximation

• Inequality

• Addition

What is the final estimated number of people who took photos with their phones?

• 35,000

• 30,000

• 25,000

• 20,000

Why is it important to estimate rather than calculate exactly in this scenario?

• To confuse the audience

• To ensure accuracy

• To avoid using technology

• To save time and resources