Estimation Techniques in Addition and Subtraction

This video tutorial covers estimating sums and differences of whole numbers by rounding. It begins with an introduction to estimation and explains the process of rounding whole numbers. The video then demonstrates how to estimate sums and differences using rounding techniques, providing practical examples. The tutorial concludes with advanced estimation examples and a summary of key points.

What is the primary goal of the video tutorial?

• To understand division of fractions

• To estimate sums and differences using rounding

• To learn multiplication techniques

• To explore geometry concepts

When rounding a number, what should you do if the digit to the right of the round-off digit is less than five?

• Change the round-off digit to zero

• Increase the round-off digit by one

• Do not change the round-off digit

• Add five to the round-off digit

In the example of rounding 3,739 to the hundreds, what is the rounded result?

• 3,600

• 3,750

• 3,700

• 3,800

How do you estimate the sum of 348 and 73 by rounding to the tens?

• Round to 350 and 80, then add

• Round to 300 and 70, then add

• Round to 350 and 70, then add

• Round to 340 and 70, then add

What is the estimated sum of 348 and 73 after rounding?

• 430

• 410

• 400

• 420

When estimating the difference by rounding to the thousands, what is the rounded result of 14,389?

• 15,000

• 14,000

• 14,500

• 13,000

What is the estimated difference between 14,000 and 7,000?

• 6,000

• 7,000

• 8,000

• 5,000

In the example of rounding to the nearest ten thousands, what is the rounded result of 90,000?

• 100,000

• 80,000

• 90,000

• 70,000

What is the estimated sum when rounding to the ten thousands in the example provided?

• 7,000,000

• 7,009,000

• 7,900,000

• 7,090,000

What is the final estimated difference when rounding to the thousands in the last example?

• 65,000

• 60,000

• 70,000

• 75,000