## Envision Math 3rd Grade Textbook Answer Key Topic 2.3 Rounding 4-Digit Numbers

Rounding 4-Digit Numbers

How can you round four-digit numbers?
The table shows ticket sales for two sports games. To the nearest thousand, about how many tickets were sold for the baseball game? Question.
Round 2,379 to the nearest thousand to find out.

Guided Practice

Do you know HOW?
Round to the nearest hundred.
Question 1.
4,569

Question 2.
2,310

Question 3.
9,992

Round to the nearest thousand.
Question 4.
4,737

Question 5.
8,333

Question 6.
4,099

Question 7.
3,914

Question 8.
1,111

Question 9.
6,274

Do you UNDERSTAND?
Question 10.
How does the halfway number on the number line help you round 2,379?

Question 11.
Writing to Explain Describe how to round 2,379 to the nearest hundred.

Question 12.
In the example above, about how many tickets were sold for the football game, to the nearest hundred? to the nearest thousand?

Independent Practice

For 13–22, round to the nearest hundred.
Question 13.
3,708

Question 14.
5,542

Question 15.
7,356

Question 16.
8,929

Question 17.
6,991

Question 18.
4,008

Question 19.
7,890

Question 20.
6,555

Question 21.
3,945

Question 22.
9,961

For 23–32, round to the nearest thousand.
Question 23.
2,774

Question 24.
3,870

Question 25.
5,077

Question 26.
7,299

Question 27.
8,603

Question 28.
6,905

Question 29.
8,500

Question 30.
4,099

Question 31.
2,495

Question 32.
9,573

One Way
You can use a number line to round. 2,379 is closer to 2,000 than to 3,000.
2,379 rounds to 2,000.
About 2,000 tickets were sold for the baseball game.

Another Way
You can use place value to round. • Find the digit in the rounding place.
• If the next digit to the right is 5 or greater, increase the digit in the rounding place by 1. If the next digit is less than 5, keep the digit in the rounding place as it is.
• Change all the digits to the right of the rounding place to zero.

So, 2,379 rounds to 2,000.
sold for the baseball game.

Problem Solving

In 33–36, write a number that rounds to the number given. Use all four of the digits at the right once in each answer. Question 33.
4,000

Question 34.
6,000

Question 35.
5,500

Question 36.
5,400

Question 37.
The Golden Gate Bridge is 4,200 feet long. What is 4,200 rounded to the nearest thousand?

Question 38.
Writing to Explain Describe the steps you would follow to round 3,647 to the nearest hundred.

Question 39.
Number Sense Write a number that rounds to 7,000 when it is rounded to the nearest thousand.

Question 40.