Lesson 2.2: Rounding to Tens, Hundreds, and Thousands
Applied concepts and practical problem solving for Rounding to Tens, Hundreds, and Thousands.
⏱️ Reading Time: 20 mins
• ❓ 50 Interactive Practice Questions
🌟
Real-Life Story: Place Value and Rounding Numbers
Regional Weather Observatory: Rounding rainfall statistics and sensor readings for annual summaries.
💡 Core Mathematical Concepts: Rounding to Tens, Hundreds, and Thousands
Focus areas: Rules for rounding up (>=5) and rounding down (<5)..
| Concept / Term | Mathematical Meaning | Real-Life Application |
|---|---|---|
| Rounding Digit | The digit in the place you are rounding to | Look at the digit immediately to its right |
| Round to Nearest 1,000 | If hundreds digit is 5 or more, round up; else keep thousands digit | 34,680 rounds to 35,000 |
| Round to Nearest 100 | If tens digit is 5 or more, round up | 28,452 rounds to 28,500 |
📝 Step-by-Step Worked Examples
Worked Example 1: Round 43,267 to nearest 100
Tens digit is 6 (>=5) -> 43,300.
Worked Example 2: Round 67,512 to nearest 1,000
Hundreds digit is 5 (>=5) -> 68,000.
⚠️ Common Misconceptions to Avoid
Common Misconception: Changing digits to the left
Correction: When rounding 52,380 to nearest 100, do not alter 52; result is 52,400.
Common Misconception: Rounding 4,995 to nearest 10
Correction: 4,995 rounds up to 5,000 due to cascading carryover.
🎯
Self-Check Challenge
A marathon registered 38,476 runners. Round this attendance to the nearest 100 and to the nearest 1,000.
Answer & Explanation:
Nearest 100: 38,500. Nearest 1,000: 38,000.
🎯 Key Learning Takeaways
Extend understanding of Rounding to Tens, Hundreds, and Thousands.
Solve multi-step real-world problems systematically.
Verify solutions through mathematical reasoning.
📄 Printable Worksheets (5 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
G5-M-CH02-WS05
A4 • 15 Qs
Place Value and Rounding Numbers: Worksheet 5
Practice Assessment 5 • Central Botanical Gardens Context
G5-M-CH02-WS04
A4 • 15 Qs
Place Value and Rounding Numbers: Worksheet 4
Practice Assessment 4 • Eco-Friendly Solar Park Context
G5-M-CH02-WS03
A4 • 15 Qs
Place Value and Rounding Numbers: Worksheet 3
Practice Assessment 3 • Harbor Marine Terminal Context
G5-M-CH02-WS02
A4 • 15 Qs
Place Value and Rounding Numbers: Worksheet 2
Practice Assessment 2 • Science & Discovery Museum Context
G5-M-CH02-WS01
A4 • 15 Qs
Place Value and Rounding Numbers: Worksheet 1
Practice Assessment 1 • City Regional Airport Context
✍️ Lesson Practice Questions (50 Questions)
Solve these real-world challenges online, test your understanding, and reveal instant step-by-step explanations.
1
Short Answer
Hard
2 Marks
How many whole numbers between 62,340 and 62,350 round to 62,350 when rounded to the nearest 10?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
6 numbers
Step-by-Step Explanation:
The numbers are 62,345, 62,346, 62,347, 62,348, 62,349, and 62,350 (6 numbers).
2
Short Answer
Hard
2 Marks
A 5-digit number has 7 in the thousands place. Rounded to the nearest 100 it is 37,400, and rounded to the nearest 10 it is 37,390. If the sum of its digits is 26, find the number.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
37,394
Step-by-Step Explanation:
From 37,390, tens is 9. Sum so far: 3 + 7 + 3 + 9 = 22. To reach sum 26, ones must be 26 - 22 = 4. Number is 37,394.
3
Short Answer
Hard
2 Marks
Explain why 450 rounds up to 500 when rounding to the nearest 100, even though 50 is equidistant between 400 and 500.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
By international mathematical convention, the halfway value (5 in the decisive place) rounds up to ensure consistency across computations.
Step-by-Step Explanation:
Halfway cases round up by standard mathematical convention.
4
Short Answer
Hard
2 Marks
Why is rounding useful when estimating large financial sums in community budgeting? Give an example.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Rounding simplifies complex numbers to friendly multiples of 100 or 1,000, allowing fast mental checks to prevent calculation errors.
Step-by-Step Explanation:
Estimation provides quick sanity checks without long manual arithmetic.
5
Short Answer
Medium
1 Mark
Leo claims: 'When rounding 39,995 to the nearest 10, the answer is 39,990.' Identify the error and provide the correct result.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40,000
Step-by-Step Explanation:
The ones digit is 5, so round up. Adding 1 ten cascades across all nines to 40,000.
6
Short Answer
Medium
1 Mark
Mia states: 'Rounding 52,489 to the nearest 100 gives 52,400 because 4 is less than 5.' What is Mia's mistake and what is the correct rounded value?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52,500
Step-by-Step Explanation:
Mia inspected the hundreds digit itself instead of the tens digit (8). Because 8 >= 5, it rounds up to 52,500.
7
Fill in the Blanks
Medium
1 Mark
What is the greatest 5-digit whole number that rounds to 60,000 when rounded to the nearest 1,000?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
60,499
Step-by-Step Explanation:
Numbers up to 60,499 round down to 60,000. The greatest is 60,499.
8
Fill in the Blanks
Medium
1 Mark
What is the smallest 5-digit whole number that rounds to 45,000 when rounded to the nearest 1,000?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
44,500
Step-by-Step Explanation:
Numbers from 44,500 to 45,499 round to 45,000. The smallest is 44,500.
9
Short Answer
Medium
1 Mark
A reforestation reserve planted 19,032 oak saplings. Round this total to the nearest 10.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
19,030
Step-by-Step Explanation:
Examine the units digit to round to the nearest ten: 19,030.
10
Short Answer
Medium
1 Mark
A freight train carries three grain hoppers weighing 24,560 kg, 24,650 kg, and 24,065 kg. List the weights in descending order (heaviest to lightest).
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
24,650 kg, 24,560 kg, 24,065 kg
Step-by-Step Explanation:
Compare hundreds digits: 650 > 560 > 065. Order: 24,650 kg > 24,560 kg > 24,065 kg.
11
Short Answer
Medium
1 Mark
At the Central Botanical Gardens, an outdoor event registered 36,225 participants. For a press release, this count is rounded to the nearest 1,000. What number is reported?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
36,000
Step-by-Step Explanation:
Check the hundreds digit to round to the nearest 1,000: 36,000.
12
Multiple Choice
Easy
1 Mark
What is 89,950 rounded to the nearest 1,000?
A
90,000
B
89,000
C
89,900
D
91,000
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
90,000
Step-by-Step Explanation:
Hundreds digit is 9 (>= 5), rounding 89,000 up to 90,000.
13
Multiple Choice
Easy
1 Mark
Which comparison statement is strictly true?
A
64,820 > 64,280
B
51,300 < 51,030
C
78,009 > 78,090
D
42,500 = 45,200
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
64,820 > 64,280
Step-by-Step Explanation:
In the hundreds place, 800 > 200, so 64,820 > 64,280.
14
Multiple Choice
Easy
1 Mark
Round 82,768 to the nearest 1,000.
A
83,000
B
82,000
C
84,000
D
82,700
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
83,000
Step-by-Step Explanation:
Check the hundreds digit. If >= 5 round up: 83,000.
15
Multiple Choice
Easy
1 Mark
Round 50,360 to the nearest 100.
A
50,400
B
50,300
C
50,500
D
50,000
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
50,400
Step-by-Step Explanation:
Check the tens digit. Since it determines rounding, 50,360 rounds to 50,400.
16
Short Answer
Hard
2 Marks
How many whole numbers between 62,340 and 62,350 round to 62,350 when rounded to the nearest 10?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
6 numbers
Step-by-Step Explanation:
The numbers are 62,345, 62,346, 62,347, 62,348, 62,349, and 62,350 (6 numbers).
17
Short Answer
Hard
2 Marks
A 5-digit number has 7 in the thousands place. Rounded to the nearest 100 it is 37,400, and rounded to the nearest 10 it is 37,390. If the sum of its digits is 26, find the number.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
37,394
Step-by-Step Explanation:
From 37,390, tens is 9. Sum so far: 3 + 7 + 3 + 9 = 22. To reach sum 26, ones must be 26 - 22 = 4. Number is 37,394.
18
Short Answer
Hard
2 Marks
Explain why 450 rounds up to 500 when rounding to the nearest 100, even though 50 is equidistant between 400 and 500.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
By international mathematical convention, the halfway value (5 in the decisive place) rounds up to ensure consistency across computations.
Step-by-Step Explanation:
Halfway cases round up by standard mathematical convention.
19
Short Answer
Hard
2 Marks
Why is rounding useful when estimating large financial sums in community budgeting? Give an example.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Rounding simplifies complex numbers to friendly multiples of 100 or 1,000, allowing fast mental checks to prevent calculation errors.
Step-by-Step Explanation:
Estimation provides quick sanity checks without long manual arithmetic.
20
Short Answer
Medium
1 Mark
Leo claims: 'When rounding 39,995 to the nearest 10, the answer is 39,990.' Identify the error and provide the correct result.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40,000
Step-by-Step Explanation:
The ones digit is 5, so round up. Adding 1 ten cascades across all nines to 40,000.
21
Short Answer
Medium
1 Mark
Mia states: 'Rounding 52,489 to the nearest 100 gives 52,400 because 4 is less than 5.' What is Mia's mistake and what is the correct rounded value?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52,500
Step-by-Step Explanation:
Mia inspected the hundreds digit itself instead of the tens digit (8). Because 8 >= 5, it rounds up to 52,500.
22
Fill in the Blanks
Medium
1 Mark
What is the greatest 5-digit whole number that rounds to 60,000 when rounded to the nearest 1,000?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
60,499
Step-by-Step Explanation:
Numbers up to 60,499 round down to 60,000. The greatest is 60,499.
23
Fill in the Blanks
Medium
1 Mark
What is the smallest 5-digit whole number that rounds to 45,000 when rounded to the nearest 1,000?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
44,500
Step-by-Step Explanation:
Numbers from 44,500 to 45,499 round to 45,000. The smallest is 44,500.
24
Short Answer
Medium
1 Mark
A reforestation reserve planted 18,912 oak saplings. Round this total to the nearest 10.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
18,910
Step-by-Step Explanation:
Examine the units digit to round to the nearest ten: 18,910.
25
Short Answer
Medium
1 Mark
A freight train carries three grain hoppers weighing 24,560 kg, 24,650 kg, and 24,065 kg. List the weights in descending order (heaviest to lightest).
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
24,650 kg, 24,560 kg, 24,065 kg
Step-by-Step Explanation:
Compare hundreds digits: 650 > 560 > 065. Order: 24,650 kg > 24,560 kg > 24,065 kg.
26
Short Answer
Medium
1 Mark
At the Eco-Friendly Solar Park, an outdoor event registered 35,910 participants. For a press release, this count is rounded to the nearest 1,000. What number is reported?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
36,000
Step-by-Step Explanation:
Check the hundreds digit to round to the nearest 1,000: 36,000.
27
Multiple Choice
Easy
1 Mark
What is 89,950 rounded to the nearest 1,000?
A
90,000
B
89,000
C
89,900
D
91,000
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
90,000
Step-by-Step Explanation:
Hundreds digit is 9 (>= 5), rounding 89,000 up to 90,000.
28
Multiple Choice
Easy
1 Mark
Which comparison statement is strictly true?
A
64,820 > 64,280
B
51,300 < 51,030
C
78,009 > 78,090
D
42,500 = 45,200
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
64,820 > 64,280
Step-by-Step Explanation:
In the hundreds place, 800 > 200, so 64,820 > 64,280.
29
Multiple Choice
Easy
1 Mark
Round 81,952 to the nearest 1,000.
A
82,000
B
81,000
C
83,000
D
81,900
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
82,000
Step-by-Step Explanation:
Check the hundreds digit. If >= 5 round up: 82,000.
30
Multiple Choice
Easy
1 Mark
Round 48,950 to the nearest 100.
A
49,000
B
48,900
C
49,100
D
48,000
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
49,000
Step-by-Step Explanation:
Check the tens digit. Since it determines rounding, 48,950 rounds to 49,000.
31
Short Answer
Hard
2 Marks
How many whole numbers between 62,340 and 62,350 round to 62,350 when rounded to the nearest 10?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
6 numbers
Step-by-Step Explanation:
The numbers are 62,345, 62,346, 62,347, 62,348, 62,349, and 62,350 (6 numbers).
32
Short Answer
Hard
2 Marks
A 5-digit number has 7 in the thousands place. Rounded to the nearest 100 it is 37,400, and rounded to the nearest 10 it is 37,390. If the sum of its digits is 26, find the number.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
37,394
Step-by-Step Explanation:
From 37,390, tens is 9. Sum so far: 3 + 7 + 3 + 9 = 22. To reach sum 26, ones must be 26 - 22 = 4. Number is 37,394.
33
Short Answer
Hard
2 Marks
Explain why 450 rounds up to 500 when rounding to the nearest 100, even though 50 is equidistant between 400 and 500.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
By international mathematical convention, the halfway value (5 in the decisive place) rounds up to ensure consistency across computations.
Step-by-Step Explanation:
Halfway cases round up by standard mathematical convention.
34
Short Answer
Hard
2 Marks
Why is rounding useful when estimating large financial sums in community budgeting? Give an example.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Rounding simplifies complex numbers to friendly multiples of 100 or 1,000, allowing fast mental checks to prevent calculation errors.
Step-by-Step Explanation:
Estimation provides quick sanity checks without long manual arithmetic.
35
Short Answer
Medium
1 Mark
Leo claims: 'When rounding 39,995 to the nearest 10, the answer is 39,990.' Identify the error and provide the correct result.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40,000
Step-by-Step Explanation:
The ones digit is 5, so round up. Adding 1 ten cascades across all nines to 40,000.
36
Short Answer
Medium
1 Mark
Mia states: 'Rounding 52,489 to the nearest 100 gives 52,400 because 4 is less than 5.' What is Mia's mistake and what is the correct rounded value?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52,500
Step-by-Step Explanation:
Mia inspected the hundreds digit itself instead of the tens digit (8). Because 8 >= 5, it rounds up to 52,500.
37
Fill in the Blanks
Medium
1 Mark
What is the greatest 5-digit whole number that rounds to 60,000 when rounded to the nearest 1,000?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
60,499
Step-by-Step Explanation:
Numbers up to 60,499 round down to 60,000. The greatest is 60,499.
38
Fill in the Blanks
Medium
1 Mark
What is the smallest 5-digit whole number that rounds to 45,000 when rounded to the nearest 1,000?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
44,500
Step-by-Step Explanation:
Numbers from 44,500 to 45,499 round to 45,000. The smallest is 44,500.
39
Short Answer
Medium
1 Mark
A reforestation reserve planted 18,792 oak saplings. Round this total to the nearest 10.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
18,790
Step-by-Step Explanation:
Examine the units digit to round to the nearest ten: 18,790.
40
Short Answer
Medium
1 Mark
A freight train carries three grain hoppers weighing 24,560 kg, 24,650 kg, and 24,065 kg. List the weights in descending order (heaviest to lightest).
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
24,650 kg, 24,560 kg, 24,065 kg
Step-by-Step Explanation:
Compare hundreds digits: 650 > 560 > 065. Order: 24,650 kg > 24,560 kg > 24,065 kg.
41
Short Answer
Medium
1 Mark
At the Harbor Marine Terminal, an outdoor event registered 35,595 participants. For a press release, this count is rounded to the nearest 1,000. What number is reported?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
36,000
Step-by-Step Explanation:
Check the hundreds digit to round to the nearest 1,000: 36,000.
42
Multiple Choice
Easy
1 Mark
What is 89,950 rounded to the nearest 1,000?
A
90,000
B
89,000
C
89,900
D
91,000
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
90,000
Step-by-Step Explanation:
Hundreds digit is 9 (>= 5), rounding 89,000 up to 90,000.
43
Multiple Choice
Easy
1 Mark
Which comparison statement is strictly true?
A
64,820 > 64,280
B
51,300 < 51,030
C
78,009 > 78,090
D
42,500 = 45,200
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
64,820 > 64,280
Step-by-Step Explanation:
In the hundreds place, 800 > 200, so 64,820 > 64,280.
44
Multiple Choice
Easy
1 Mark
Round 81,180 to the nearest 1,000.
A
81,000
B
80,000
C
82,000
D
81,100
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
81,000
Step-by-Step Explanation:
Check the hundreds digit. If >= 5 round up: 81,000.
45
Multiple Choice
Easy
1 Mark
Round 47,575 to the nearest 100.
A
47,600
B
47,500
C
47,700
D
47,000
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
47,600
Step-by-Step Explanation:
Check the tens digit. Since it determines rounding, 47,575 rounds to 47,600.
46
Short Answer
Hard
2 Marks
How many whole numbers between 62,340 and 62,350 round to 62,350 when rounded to the nearest 10?
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
6 numbers
Step-by-Step Explanation:
The numbers are 62,345, 62,346, 62,347, 62,348, 62,349, and 62,350 (6 numbers).
47
Short Answer
Hard
2 Marks
A 5-digit number has 7 in the thousands place. Rounded to the nearest 100 it is 37,400, and rounded to the nearest 10 it is 37,390. If the sum of its digits is 26, find the number.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
37,394
Step-by-Step Explanation:
From 37,390, tens is 9. Sum so far: 3 + 7 + 3 + 9 = 22. To reach sum 26, ones must be 26 - 22 = 4. Number is 37,394.
48
Short Answer
Hard
2 Marks
Explain why 450 rounds up to 500 when rounding to the nearest 100, even though 50 is equidistant between 400 and 500.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
By international mathematical convention, the halfway value (5 in the decisive place) rounds up to ensure consistency across computations.
Step-by-Step Explanation:
Halfway cases round up by standard mathematical convention.
49
Short Answer
Hard
2 Marks
Why is rounding useful when estimating large financial sums in community budgeting? Give an example.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Rounding simplifies complex numbers to friendly multiples of 100 or 1,000, allowing fast mental checks to prevent calculation errors.
Step-by-Step Explanation:
Estimation provides quick sanity checks without long manual arithmetic.
50
Short Answer
Medium
1 Mark
Leo claims: 'When rounding 39,995 to the nearest 10, the answer is 39,990.' Identify the error and provide the correct result.
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40,000
Step-by-Step Explanation:
The ones digit is 5, so round up. Adding 1 ten cascades across all nines to 40,000.