Assessing the Reasonableness of Products Using Front End Estimation

The video tutorial explains how to assess the reasonableness of multiplication results using front end estimation. It introduces the concept, demonstrates it with two examples, and concludes with a summary. The first example involves Grace's multiplication of 77 by 43, showing her result is reasonable. The second example with Fernando's multiplication of 943 by 7 reveals his result is not reasonable. The lesson emphasizes understanding estimation errors and their impact on the reasonableness of answers.

What is the primary purpose of using front end estimation in multiplication problems?

• To check if the answer is reasonable

• To make the problem more complex

• To find the exact answer

• To avoid doing the multiplication

In Grace's problem, what was the estimated product using front end estimation?

• 3290

• 3311

• 490

• 2800

How much was the front end estimation off by in Grace's problem?

• 490

• 700

• 280

• 210

Why was Fernando's answer considered unreasonable?

• It was exactly the same as the estimate

• It had more digits than expected

• It was smaller than the estimated product

• It was larger than the estimated product

What should be the real product of 943 and 7 according to front end estimation?

• More than 6300

• Exactly 6000

• Less than 6000

• Exactly 6300