Rounding and Estimation Techniques

The video tutorial explains how to estimate answers by rounding numbers to the nearest ten. It begins with an introduction to estimation and rounding, followed by solving a multiplication problem without rounding to get an exact answer. The tutorial then demonstrates how to round numbers to the nearest ten and use these rounded numbers to estimate the result of the multiplication problem. The final estimated answer is calculated by multiplying the rounded numbers and adding zeros appropriately.

What is the main purpose of rounding numbers in estimation?

• To get an exact answer

• To simplify calculations

• To confuse the problem

• To make numbers larger

When rounding numbers, to which place value do we typically round?

• The largest digit

• The smallest digit

• The middle digit

• The last digit

What is the exact answer to the problem 72 * 48?

• 3,456

• 3,400

• 3,600

• 3,500

What is the first step in rounding the number 72?

• Look at the tens place

• Look at the hundreds place

• Look at the ones place

• Look at the thousands place

To what number do we round 72?

• 80

• 75

• 70

• 60

What is the digit to the immediate right of the tens place in 72?

• 4

• 8

• 2

• 7

What is the first step in rounding the number 48?

• Look at the hundreds place

• Look at the tens place

• Look at the thousands place

• Look at the ones place

To what number do we round 48?

• 50

• 45

• 40

• 55

What is the digit to the immediate right of the tens place in 48?

• 5

• 8

• 4

• 2

What is the new estimated problem after rounding 72 and 48?

• 60 * 50

• 70 * 50

• 80 * 50

• 70 * 40