This video tutorial teaches how to use front-end estimation to check the reasonableness of answers in math problems. It explains the concept of rounding to the lead digit and demonstrates its application in both simple addition and multi-step story problems. The tutorial emphasizes the importance of verifying answers to ensure they make sense, using examples to illustrate the process.

What is the primary purpose of using estimation in solving story problems?

• To check if the answer is reasonable

• To avoid using a calculator

• To make calculations faster

• To find the exact answer

What is another name for front-end estimation?

• Rounding to the nearest ten

• Rounding to the lead digit

• Rounding to the nearest hundred

• Rounding to the nearest thousand

When using front-end estimation, what is the estimated value of 437?

• 450

• 400

• 430

• 440

What is the estimated sum of 437 and 529 using front-end estimation?

• 900

• 1100

• 800

• 1000

In the cupcake story problem, how many cupcakes did Jack and Jill bake together?

• 550

• 600

• 500

• 450

How many cupcakes were sold in the story problem?

• 125

• 100

• 120

• 115

What is the final number of cupcakes left after selling, according to the story problem?

• 400

• 425

• 435

• 450

Using front-end estimation, what is the estimated number of cupcakes left?

• 350

• 450

• 300

• 400

What is the lead digit of Jack's cupcakes in the estimation process?

• 4

• 3

• 2

• 1

Why is front-end estimation useful in solving story problems?

• It helps verify the reasonableness of an answer

• It eliminates the need for subtraction

• It simplifies complex calculations

• It provides the exact answer