Rounding and Estimation Techniques

This video tutorial covers Module 2, Lesson 2, focusing on estimating multi-digit products by rounding factors to basic facts. The instructor explains the process of rounding numbers to their highest place value and demonstrates this through several examples. The video emphasizes understanding place value patterns and provides step-by-step guidance on estimating products using rounded numbers. Students are encouraged to practice independently and verify their answers.

What is the main purpose of this video?

• To provide a detailed history of mathematics.

• To help with homework by explaining estimation.

• To introduce new mathematical concepts.

• To discuss the importance of exact calculations.

What is the focus of Module 2, Lesson 2?

• Learning basic addition.

• Estimating multi-digit products by rounding.

• Understanding fractions.

• Solving algebraic equations.

When rounding factors, to which place value should you round?

• The nearest decimal.

• The nearest whole number.

• The highest place value digit in each factor.

• The smallest place value.

In Example A, what is the rounded value of 697?

• 750

• 800

• 700

• 600

In Example A, what is the estimated product of 697 and 82?

• 70,000

• 50,000

• 60,000

• 56,000

In Example B, what is the rounded value of 5897?

• 5000

• 8000

• 7000

• 6000

In Example B, what is the estimated product of 5897 and 70?

• 450,000

• 400,000

• 420,000

• 500,000

In Example C, what is the rounded value of 8840?

• 8000

• 9000

• 8500

• 9500

In Example C, what is the estimated product of 8840 and 45?

• 500,000

• 450,000

• 550,000

• 400,000

In Example D, what is the rounded value of 98 tens?

• 1100

• 950

• 900

• 1000