Download Round to the Nearest 10, 100, or 1000

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Estimate,
round, and manipulate very large (e.g., millions) and
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UNDERLYING SKILLS AND CONCEPTS:
very small (e.g., thousandths) numbers.
use place value;
read and write numbers;
use a number line
Round to the Nearest 10, 100, or 1,000
I’m rounding 5,423 to the nearest 10.
Rounding is one way to
estimate a number.
You use place value when
you round.
5,420
A number line can help you.
E x am p l E
5,430
Half-way is 5,425.
1
Samuel’s school had 5,423 students.
What is the number of students
rounded to the nearest ten?
Hint: Is 5,423 closer to 5,420 or 5,430?
23
You are rounding to the nearest ten, so circle the digit in the tens place: 5,4●
Go to the digit to the right of the circled digit. Underline it. 5,4●
23
E x am p l E
3!5
Closer to
5,400 or 5,500?
2
Round the number 5,428 to the nearest hundred.
4 28
Circle the digit in the hundreds place: 5,●
Underline the digit to the right. 5,●
4 28
5,300
2 is less than 5, so round down.
5,428 rounded to the nearest hundred is 5,400.
E x am p l E
page 6
5,400
5,500
5,600
3
Round the number 1,437,621 to
the nearest thousand.
1,437,621 is closer to 1,438,000.
5,428
1,437,621
1,437,000
1,437,500
is half-way
between
1,438,000
Chapter 1 – Lesson 3
E – © CSL Associates, Inc. All rights reserved.
If the underlined digit is less than 5, round down.
If it is ≥ 5, round up.
3 is less than 5, so round down to 5,420.
5,423 rounded to the nearest ten is 5,420.
Name
P RAC T I C E
Round each number to the nearest ten. You may use the number lines to help.
1. 45 rounds to
30
50
40
2. 145 rounds to 150
130
50
140
150
3. 6,209
6,210
4. 236,894
236,890
6. 12,875
12,880
7. 999,995
1,000,000
8. 6,204
6,200
Round each number to the nearest hundred.
9. 220
200
10. 11,278
11,300
11. 180,440
180,400
1,700
13. 22,850
22,900
14. 1,098,950 1,099,000
Round each number to the nearest thousand.
15. 501
1,000
16. 62,199
62,000
17. 3,889,704 3,890,000
12. 1,678
18. 6,916
7,000
5. 1,783,496 1,783,500
19. 1,805,500 1,806,000
20. 9,999,499 9,999,000
Solve.
E – © CSL Associates, Inc. All rights reserved.
21. 62,346 people attended the Washington School football game. About
62,000 people
how many people attended, to the nearest thousand?
22. A plane flew at an altitude of 35,564 feet. What is its altitude,
36,000 ft
rounded to the nearest thousand?
Circle the correct choice.
23. A newspaper reported that about 45,000 people attended a
football game, rounded to the nearest thousand. Which could be
the exact number of people at the game?
A
4,489
Math
Reasoning
B 44,489
C 45,342
D 46,501
Rounding
MR 1.1, 2.6
24. I am a four-digit number. When rounded to the nearest hundred, I am 4,900. I am 5,000
when rounded to the nearest thousand. Who am I?
Any number from 4,850 to 4,949.
Chapter 1 – Lesson 3
page 7
MCX94.HW.CL.G5.FM&Lesson.v211
8/2/04
18:02
Page 6
Name
…at home!
P RAC T I C E
Round each number to the nearest ten. You may use the number lines to help.
1. 45 rounds to
30
50
2. 144 rounds to 140
40
130
50
140
150
3. 5,308
5,310
4. 147,893
147,890
5. 1,894,487
6. 14,765
14,770
7. 888,885
888,890
8. 5,309
Round each number to the nearest hundred.
9. 330
300
10. 22,389
22,400
11. 190,340
1,800
34,000
14. 2,087,850 2,087,900
12. 1,789
13. 33,960
Round each number to the nearest thousand.
15. 503
1,000
16. 73,288
18. 7,832
8,000
73,000
1,894,490
5,310
190,300
17. 3,789,804 3,790,000
19. 1,607,700 1,608,000
20. 9,989,500 9,990,000
Solve.
About how many people attended, to the nearest thousand?
51,000 people
22. A plane flew at an altitude of 28,591 feet. What is its altitude,
29,000 ft
rounded to the nearest thousand?
Circle the correct choice.
23. A newspaper reported that about 35,000 people attended a
basketball game, rounded to the nearest thousand. Which could be
the exact number of people at the game?
A
3,489
Math
Reasoning
B 34,489
C 35,342
D 36,501
Rounding
MR 1.1, 2.6
24. I am a four-digit number. When rounded to the nearest hundred, I am 3,800.
I am 4,000 when rounded to the nearest thousand. Who am I?
Any number from 3,750 to 3,849
page 6
Home Resource and Homework
Chapter 1 Lesson 3
E – © CSL Associates, Inc. All rights reserved.
21. 51,439 people attended the Lincoln School basketball game.
MCX94TEG5CH01_32.v7.4.2 2/24/01 19:42 Page 15
Name
P RAC T I C E
Round each number to the nearest ten. You may use the number lines to help.
1. 45 rounds to
30
50
40
2. 145 rounds to 150
130
50
140
150
3. 6,209
6,210
4. 236,894
236,890
6. 12,875
12,880
7. 999,995
1,000,000
8. 6,204
6,200
Round each number to the nearest hundred.
9. 220
200
10. 11,278
11,300
11. 180,440
180,400
1,700
13. 22,850
22,900
14. 1,098,950 1,099,000
Round each number to the nearest thousand.
15. 501
1,000
16. 62,199
62,000
17. 3,889,704 3,890,000
12. 1,678
18. 6,916
7,000
5. 1,783,496 1,783,500
19. 1,805,500 1,806,000
20. 9,999,499 9,999,000
Solve.
E – © CSL Associates, Inc. All rights reserved.
21. 62,346 people attended the Washington School football game. About
62,000 people
how many people attended, to the nearest thousand?
22. A plane flew at an altitude of 35,564 feet. What is its altitude,
36,000 ft
rounded to the nearest thousand?
Circle the correct choice.
23. A newspaper reported that about 45,000 people attended a
football game, rounded to the nearest thousand. Which could be
the exact number of people at the game?
A
4,489
Math
Reasoning
B 44,489
C 45,342
D 46,501
Rounding
MR 1.1, 2.6
24. I am a four-digit number. When rounded to the nearest hundred, I am 4,900. I am 5,000
when rounded to the nearest thousand. Who am I?
Any number from 4,850 to 4,949.
Chapter 1 – Lesson 3
Student Book Page
page 7
Name
…at home!
P RAC T I C E
Round each number to the nearest ten. You may use the number lines to help.
1. 45 rounds to
30
50
2. 144 rounds to 140
40
130
50
140
150
3. 5,308
5,310
4. 147,893
147,890
5. 1,894,487
6. 14,765
14,770
7. 888,885
888,890
8. 5,309
Round each number to the nearest hundred.
9. 330
300
10. 22,389
22,400
11. 190,340
1,800
34,000
14. 2,087,850 2,087,900
12. 1,789
13. 33,960
Round each number to the nearest thousand.
15. 503
1,000
16. 73,288
18. 7,832
8,000
73,000
1,894,490
5,310
190,300
17. 3,789,804 3,790,000
19. 1,607,700 1,608,000
20. 9,989,500 9,990,000
Solve.
About how many people attended, to the nearest thousand?
51,000 people
22. A plane flew at an altitude of 28,591 feet. What is its altitude,
29,000 ft
rounded to the nearest thousand?
Circle the correct choice.
23. A newspaper reported that about 35,000 people attended a
basketball game, rounded to the nearest thousand. Which could be
the exact number of people at the game?
A
3,489
Math
Reasoning
B 34,489
C 35,342
D 36,501
Rounding
MR 1.1, 2.6
24. I am a four-digit number. When rounded to the nearest hundred, I am 3,800.
I am 4,000 when rounded to the nearest thousand. Who am I?
Any number from 3,750 to 3,849
page 6
Home Resource and Homework
Chapter 1 Lesson 3
E – © CSL Associates, Inc. All rights reserved.
21. 51,439 people attended the Lincoln School basketball game.