Rounding with a Vertical Number line

Rounding with a Vertical Number line

Rounding

We use rounding techniques to make quick estimates in our calculations.

Martha has $2,304 in the bank, and Mary has $4,821.

Martha has about $2,000 and Mary has about $5,000.

Together, they have about $7,000.

Multiple Choice

If you round 537 to the nearest hundred, what multiple of one hundred would be on the bottom of the number line?

• 600

• 500

• 400

• 530

537

Our number has a 5 in the hundreds place. That means it is at least 500 but less than 600

Multiple Choice

If you round 537 to the nearest hundred, what multiple of one hundred would be on the top of the number line?

• 600

• 500

• 400

• 530

537

Our number has a 5 in the hundreds place. That means it is at least 500 but less than 600

4,294

There are 4,294 students at Sparter Middle School. About how many students is that?

Multiple Choice

If I round the number 4,294 to the nearest thousand, what number would be at the top of my vertical number line?

• 4,000

• 5,000

• 6,000

• 3,000

4,294

We have 4 thousands in our number.

That means our number is more than 4,000 but less than 5,000.

Multiple Choice

When rounding 4,294 to the nearest thousand, what is the halfway point on our vertical number line?

• 4,005

• 4,050

• 4,500

• 5,400

Multiple Choice

What does 4,294 rounded to the nearest thousand round to?

• 5,000

• 4,000

Round down

4,294 is less than halfway to 5,000, so it will round to about 4,000.