## Envision Math 4th Grade Textbook Answer Key Topic 2.2 Rounding Whole Numbers

Rounding Whole Numbers

How can you round numbers?
Round 293,655,404 to the nearest thousand and to the nearest hundred thousand. You can use place value to round numbers.

Guided Practice*

Do you know HOW?

In 1 through 6, round each number to the place of the underlined digit.

Question 1.
128,955
Answer:

Question 2.
85,639
Answer:

Question 3.
9,924
Answer:

Question 4.
1,194,542
Answer:

Question 5.
160,656
Answer:

Question 6.
149,590
Answer:

Do You Understand ?

Question 7.
Writing to Explain Explain how to round a number when 7 is the digit to the right of the rounding place.
Answer:

Question 8.
In 2000 the population of the United States was 281,421,906. Round 281,421,906 to the nearest hundred thousand.
Answer:

independent Practice

Leveled Practice In 9 through 28, round each number to the place of the underlined digit. You may use a number line to help you.

Question 9.
493,295

Answer:

Question 10.
39,230

Answer:

Question 11.
77,292

Answer:

Question 12.
54,846

Answer:

Question 13.
4,028
Answer:

Question 14.
6,668,365
Answer:

Question 15.
453,280
Answer:

Question 16.
17,909
Answer:

Question 17.
1,406
Answer:

Question 18.
55,560
Answer;

Question 19.
21,679
Answer;

Question 20.
3,417,547
Answer:

Question 21.
117,821
Answer:

Question 22.
75,254
Answer:

Question 23.
9,049
Answer:

Question 24.
1,666,821
Answer:

Question 25.
2,420
Answer:

Question 26.
9,000,985
Answer:

Question 27.
9,511
Answer:

Question 28.
73,065
Answer:

Round 293,655,404 to the nearest thousand.

If the digit to the right of the rounding place is 5 or more, add 1 to the rounding digit. If it is less than 5, leave the rounding digit alone.

293,655,000
Since 4 < 5, leave the rounding digit as is. Change the digits to the right of the rounding place to zeros.
So, 293,655,404 rounds to 293,655,000.

Round 293,655,404 to the nearest hundred thousand.

The digit to the right of the rounding place is 5.

Since the digit is 5, round by adding 1 to the digit in the hundred thousands place.
So, 293,655,404 rounds to 293,700,000.

Problem Solving

Question 29.
For each zoo in the chart, round the attendance to the nearest hundred thousand.
Answer:

Question 30.
Reasoning Which zoo had the greatest number of visitors?
Answer:

Question 31.
Number Sense Write four numbers that round to 700 when rounded to the nearest hundred.
Answer:

Question 32.
Reasoning Write a number that when rounded to the nearest thousand and hundred will have a result that is the same.
Answer:

Question 33.
Jonas read that about 1,760,000 people will graduate from high school in California in the next four years. Jonas thinks this number
is rounded to the nearest ten thousand. What would the number be if it was rounded to the nearest hundred thousand?
Answer:

Question 34.
Liz had attended class every day since she started school as a kindergartner. She said she had been in school for about 1,000 days. What could the actual number of school days be if she rounded to the nearest ten?
Answer:

Question 35.
When rounded to the nearest ten thousand, which number would be rounded to 120,000?
A. 123,900
B. 126,480
C. 128,770
D. 130,000
Answer:

Question 36.
A fruit market sold 3,849 apples, 3,498 oranges, and 3,894 pears in one day. Write these numbers in order from greatest to least.
Answer: