Unit 6 Contents

1. Find at least two ways to round each of these numbers.
• Draw a number line for each rounded number.
• Label your line with the benchmarks you chose.
• Estimate the location of the actual number on the number line.
1. 5599
2. 24,681
3. 18,260
4. 764,296
5. 206,492
6. 6,847,000

Use this number line to answer Questions 2–4.

2. According to an article Linda hung on the Newswire, 1,858,766 people visited the aquarium last year. Use the number line to round 1,858,766 to the nearest hundred thousand.
3. The Willis Tower Skydeck had 1,510,063 visitors in one year. Use the number line to round 1,510,063 to the nearest hundred thousand.
4. During one season, a total of 1,697,398 people attended home games of the Chicago White Sox. Use the number line to round 1,697,398 to the nearest hundred thousand.

Addition and Subtraction Practice with Paper and Pencil

Solve the following problems using paper and pencil. Find exact answers. Show all your work. Use estimation to look back and see if your answers are reasonable. Show how you estimated.