4.2D and 4.2G Estimation and Compatible Numbers

A shoe store counted the pairs of shoes they had in the store. They counted 15,456 pairs of shoes. What is this number rounded to the nearest thousand?

• 1. 15,460

• 1. 15,000

• 1. 15,500

• 1. 16,000

2. Harry got an interlocking brick set that had 436 pieces. What is this number rounded to the nearest ten?

• 400

• 430

• 440

• 500

A library has 175,253 books. What is this number rounded to the nearest hundred thousand?

• 1. 180,000

• 1. 175,300

• 1. 200,000

• 1. 175,000

4. During the first 4 days of summer, 54,659 people attended a zoo in California. What is this number rounded to the nearest hundred? 

• 6. 50,000

• 6. 54,660

• 6. 54,600

• 10. 54,700

6. The table shows the number of parents who attended an open house for each grade level. Which of the following is the best estimate of the total number of parents attending the open house? 

• 6. 2,600

• 6. 2,800

• 6. 2,400

• 10. 2,500

When rounding to the nearest thousand, which of the following numbers does NOT round to 10,000?

• 1. 10,556

• 1. 9,543

• 1. 10,435

• 1. 9,990

Jason’s grandma has $153 to share with her three grandsons. She plans to give the same amount of money to each boy. Which of the following is the best estimate of how much money each boy will receive?

• 1. $150

• 1. $50

• 1. $30

• 1. $450

8. Two people at an insurance company are competing to see who can write the most policies by the end of the year.

• Brett wrote 10,556 policies.

• Anna wrote 5,417 policies. 

Which of the following is the best estimate of how many more policies Brett wrote than Anna wrote? 

• 6. 3,000

• 6. 15,000

• 6. 16,000

• 10. 6,000

9. Leo’s mom bought a new game system and three games. The game system was $299, and the games cost between $40 and $60. Which of the following is not a reasonable cost for the game system and the three games? 

• 1. $420

• 1. $480

• 1. $400

• 1. $450

Jorge makes $12 an hour mowing lawns. He worked for 17 hours. Which is the best estimate of the total amount of money Jorge made?

• $400

• $30

• 6. $200

• 10. $100