Assess Reasonableness of an Answer Using Front End Estimation

This video tutorial teaches how to use front end estimation to check the reasonableness of answers in story problems. It explains the concept of rounding to the lead digit and provides examples with numbers 437 and 529. A story problem involving cupcakes is used to demonstrate the application of front end estimation in a multi-step problem. The lesson concludes by reinforcing the importance of checking answers for reasonableness.

What is the main purpose of using front end estimation?

• To avoid using place value tools

• To make calculations more complex

• To check if an answer is reasonable

• To find the exact answer to a problem

When using front end estimation, what is the value of 437 rounded to the lead digit?

• 400

• 450

• 430

• 440

What is the estimated sum of 400 and 500 using front end estimation?

• 900

• 950

• 850

• 800

In the story problem, how many cupcakes did Jack and Jill have together before selling any?

• 600

• 500

• 550

• 450

Using front end estimation, what is the estimated number of cupcakes left after selling 115?

• 350

• 400

• 300

• 450