Rounding Numbers and Estimation

The video tutorial explains how to estimate the sum of 4,99 and 3,217 by rounding each number to the nearest thousand. It demonstrates rounding 4,99 up to 5,000 and 3,217 down to 3,000, resulting in an estimated sum of 8,000.

What is the first step in estimating the sum of two numbers by rounding?

• Round each number to the nearest hundred.

• Subtract the smaller number from the larger one.

• Add the numbers directly.

• Round each number to the nearest thousand.

Which digit do you look at to decide whether to round up or down?

• The digit to the left of the rounding place.

• The digit in the rounding place.

• The first digit of the number.

• The digit to the right of the rounding place.

What does the digit '9' in the number 499 tell us to do when rounding to the nearest thousand?

• Round down.

• Round up.

• Keep the number the same.

• Ignore the digit.

After rounding 499 to the nearest thousand, what is the result?

• 4,000

• 5,000

• 400

• 500

In the number 3,217, which digit is in the rounding place when rounding to the nearest thousand?

• 3

• 7

• 2

• 1

What does the digit '2' in the number 3,217 tell us to do when rounding to the nearest thousand?

• Round down.

• Round up.

• Keep the number the same.

• Ignore the digit.

After rounding 3,217 to the nearest thousand, what is the result?

• 3,200

• 3,000

• 4,000

• 3,500

What is the estimated sum of 499 and 3,217 after rounding both numbers to the nearest thousand?

• 9,000

• 10,000

• 8,000

• 7,000

Why do we change all digits to the right of the rounding place to zero?

• To make the number smaller.

• To make the number larger.

• To ensure accuracy in rounding.

• To simplify the number.

What is the purpose of rounding numbers before adding them?

• To make the addition process faster.

• To make the numbers more complex.

• To increase the sum.

• To decrease the sum.