Lesson 5.2: Comparing and Ordering 4-Digit Numbers: Greater Than, Less Than
Compare 4-digit numbers using >, <, =, and order lists of numbers in ascending and descending order.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
🌟
Real-Life Story: Place Value and Number Comparison
Flight controllers monitor altitude readings for two commercial jets: Flight A is at 8,450 meters and Flight B is at 8,490 meters. By comparing thousands (equal), hundreds (equal), and tens (5 vs 9), they determine Flight B is cruising higher.
💡 Core Mathematical Concepts: Comparing & Ordering Numbers
Focus areas: Greater than (>), less than (<), equal to (=), ascending order, descending order.
| Concept / Term | Mathematical Definition | Everyday Example |
|---|---|---|
| Comparison Symbols | > (greater than), < (less than), = (equal to) | 'The alligator's mouth always eats the bigger number' |
| Step-by-Step Comparison | Compare from highest place value to lowest: Thousands first, then Hundreds, then Tens, then Ones | In 6,740 vs 6,719: 6=6, 7=7, but 4 tens > 1 ten |
| Ascending Order | Arranging numbers from smallest to largest (increasing) | 1,240 < 2,150 < 3,490 < 4,000 |
| Descending Order | Arranging numbers from largest to smallest (decreasing) | 5,800 > 4,200 > 3,100 > 1,900 |
🔍 Practical Classroom & Everyday Examples
Example 1: Equal Highest Digits
If the thousands digits are identical, move immediately to the hundreds place to break the tie.
Example 2: Digit Count First
Any 4-digit number is automatically larger than any 3-digit number (e.g., 1,002 > 998).
⚠️ Watch Out! Common Mistakes to Avoid
Common Error: Comparing from right to left
Correction: Never compare ones first! Always start from the leftmost (highest) place value.
Common Error: Reversing > and < symbols
Correction: Remember the pointed vertex points to the smaller number (e.g., 3,000 < 5,000).
🎯 Quick Self-Check Challenge
Arrange in ascending order: 4,320; 4,230; 4,302; 4,032.
Answer & Explanation:
Compare hundreds and tens: 4,032 < 4,230 < 4,302 < 4,320.
🎯 Key Learning Takeaways
Master Place Value and Number Comparison fundamentals.
📄 Printable Worksheets (5 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
G3-M-CH05-WS05
A4 • 15 Qs
Place Value and Number Comparison — Worksheet 5
Digit Values, Ordering & Comparison Proofs (Solar Generator Energy Logs)
G3-M-CH05-WS04
A4 • 15 Qs
Place Value and Number Comparison — Worksheet 4
Digit Values, Ordering & Comparison Proofs (School Charity Fundraisers)
G3-M-CH05-WS03
A4 • 15 Qs
Place Value and Number Comparison — Worksheet 3
Digit Values, Ordering & Comparison Proofs (Warehouse Inventory Batches)
G3-M-CH05-WS02
A4 • 15 Qs
Place Value and Number Comparison — Worksheet 2
Digit Values, Ordering & Comparison Proofs (Ocean Depth Soundings)
G3-M-CH05-WS01
A4 • 15 Qs
Place Value and Number Comparison — Worksheet 1
Digit Values, Ordering & Comparison Proofs (Mountain Peak Altitudes)
✍️ 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
I am a 4-digit number between 7,000 and 8,000. All four of my digits are odd and different. The sum of my digits is 16. What number am I?
A
7,135
B
7,351
C
7,531
D
7,315
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
7,135
Step-by-Step Explanation:
Thousands = 7. Remaining sum = 16 - 7 = 9. Distinct odd digits summing to 9: 1 + 3 + 5 = 9. Possible number is 7,135 (or 7,351, 7,531).
2
Short Answer
Hard
2 Marks
Using digits 5, 0, 8, 3 without repeating any digit, what is the SMALLEST 4-digit number you can form?
A
3,058
B
0,358
C
3,508
D
3,085
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,058
Step-by-Step Explanation:
Zero cannot be the leading thousands digit. Place smallest non-zero digit (3) first, then 0 in hundreds: 3,058.
3
Short Answer
Hard
2 Marks
If you swap the hundreds and tens digits in the number 4,720, how does the value of the number change?
A
It becomes 4,270, which is 450 less than the original number
B
It becomes 4,702
C
The value stays the same
D
It increases by 500
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
It becomes 4,270, which is 450 less than the original number
Step-by-Step Explanation:
Original = 4,720. Swapped = 4,270. Difference = 4,720 - 4,270 = 450 decrease.
4
Short Answer
Hard
2 Marks
Why is any 4-digit number automatically greater than any 3-digit number?
A
A 4-digit number has at least 1 thousand (1,000+), while the greatest possible 3-digit number is only 999
B
Because 4 is an even number
C
Because 3-digit numbers cannot have zeroes
D
Only when both numbers are odd
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
A 4-digit number has at least 1 thousand (1,000+), while the greatest possible 3-digit number is only 999
Step-by-Step Explanation:
The minimum 4-digit number is 1,000, which exceeds the maximum 3-digit number (999).
5
Short Answer
Medium
1 Mark
A student compares 4,809 and 4,890 and writes '4,809 > 4,890' because 9 ones is greater than 0 ones. Why is this reasoning flawed?
A
The comparison must check the tens place before the ones place; 9 tens (90) is greater than 0 tens (0)
B
4,809 has more digits
C
The hundreds place is different
D
Both numbers are equal
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
The comparison must check the tens place before the ones place; 9 tens (90) is greater than 0 tens (0)
Step-by-Step Explanation:
Place value comparison prioritizes higher places: 809 has 0 tens, while 890 has 9 tens.
6
Short Answer
Medium
1 Mark
Sam says: 'In the number 6,432, the digit 6 has a face value of 6,000.' What is Sam's mistake?
A
Face value is just 6; 6,000 is its place value
B
6 has no face value
C
The face value is 600
D
Sam is completely correct
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Face value is just 6; 6,000 is its place value
Step-by-Step Explanation:
Face value is the digit itself (6). Place value accounts for position (6 × 1,000 = 6,000).
7
Fill in the Blanks
Medium
1 Mark
Complete the inequality: 3,450 < [ ? ] < 3,490
A
3,475
B
3,440
C
3,500
D
3,405
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,475
Step-by-Step Explanation:
3,475 is between 3,450 and 3,490.
8
Fill in the Blanks
Medium
1 Mark
Find the missing digit to make the statement true: 5,6[ ? ]4 > 5,674
A
8
B
7
C
6
D
5
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
8
Step-by-Step Explanation:
To make 5,6_4 > 5,674, the tens digit must be strictly greater than 7 (so 8 or 9).
9
Short Answer
Medium
1 Mark
A car dealership sold 1,425 cars in Year 1, 1,452 cars in Year 2, and 1,245 cars in Year 3. Order the years from greatest sales to least sales:
A
Year 2 (1,452), Year 1 (1,425), Year 3 (1,245)
B
Year 1, Year 2, Year 3
C
Year 3, Year 1, Year 2
D
Year 2, Year 3, Year 1
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Year 2 (1,452), Year 1 (1,425), Year 3 (1,245)
Step-by-Step Explanation:
1,452 > 1,425 > 1,245. Descending order is Year 2, Year 1, Year 3.
10
Short Answer
Medium
1 Mark
Two mountain trails measure 3,850 meters and 3,580 meters. Which trail is longer, and by how many meters?
A
3,850 m trail is longer by 270 meters
B
3,580 m trail is longer
C
Both trails are equal
D
3,850 m trail is longer by 170 meters
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,850 m trail is longer by 270 meters
Step-by-Step Explanation:
3,850 > 3,580. Difference = 3,850 - 3,580 = 270 meters.
11
Short Answer
Medium
1 Mark
At the Solar Generator Energy Logs, four teams recorded scores: Team A (8100), Team B (8450), Team C (8050), Team D (8900). Which team scored the lowest?
A
Team with 8050
B
Team with 8900
C
Team with 8100
D
Team with 8450
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Team with 8050
Step-by-Step Explanation:
The lowest score is 8050.
12
Multiple Choice
Easy
1 Mark
What is the face value of the digit 4 in 6,482?
A
4
B
400
C
40
D
4,000
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
4
Step-by-Step Explanation:
The face value of any digit is the digit itself: 4.
13
Multiple Choice
Easy
1 Mark
Which of the following numbers is the LARGEST?
A
8900
B
8050
C
8100
D
8450
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
8900
Step-by-Step Explanation:
8900 has the greatest value.
14
Multiple Choice
Easy
1 Mark
Which symbol correctly completes the comparison: 8100 [ ? ] 8450
A
<
B
>
C
=
D
+
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
<
Step-by-Step Explanation:
8100 is less than 8450.
15
Multiple Choice
Easy
1 Mark
What is the place value of the digit 7 in the number 7,425?
A
7,000
B
700
C
70
D
7
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
7,000
Step-by-Step Explanation:
7 is in the thousands place, so its place value is 7,000.
16
Short Answer
Hard
2 Marks
I am a 4-digit number between 7,000 and 8,000. All four of my digits are odd and different. The sum of my digits is 16. What number am I?
A
7,135
B
7,351
C
7,531
D
7,315
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
7,135
Step-by-Step Explanation:
Thousands = 7. Remaining sum = 16 - 7 = 9. Distinct odd digits summing to 9: 1 + 3 + 5 = 9. Possible number is 7,135 (or 7,351, 7,531).
17
Short Answer
Hard
2 Marks
Using digits 5, 0, 8, 3 without repeating any digit, what is the SMALLEST 4-digit number you can form?
A
3,058
B
0,358
C
3,508
D
3,085
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,058
Step-by-Step Explanation:
Zero cannot be the leading thousands digit. Place smallest non-zero digit (3) first, then 0 in hundreds: 3,058.
18
Short Answer
Hard
2 Marks
If you swap the hundreds and tens digits in the number 4,720, how does the value of the number change?
A
It becomes 4,270, which is 450 less than the original number
B
It becomes 4,702
C
The value stays the same
D
It increases by 500
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
It becomes 4,270, which is 450 less than the original number
Step-by-Step Explanation:
Original = 4,720. Swapped = 4,270. Difference = 4,720 - 4,270 = 450 decrease.
19
Short Answer
Hard
2 Marks
Why is any 4-digit number automatically greater than any 3-digit number?
A
A 4-digit number has at least 1 thousand (1,000+), while the greatest possible 3-digit number is only 999
B
Because 4 is an even number
C
Because 3-digit numbers cannot have zeroes
D
Only when both numbers are odd
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
A 4-digit number has at least 1 thousand (1,000+), while the greatest possible 3-digit number is only 999
Step-by-Step Explanation:
The minimum 4-digit number is 1,000, which exceeds the maximum 3-digit number (999).
20
Short Answer
Medium
1 Mark
A student compares 4,809 and 4,890 and writes '4,809 > 4,890' because 9 ones is greater than 0 ones. Why is this reasoning flawed?
A
The comparison must check the tens place before the ones place; 9 tens (90) is greater than 0 tens (0)
B
4,809 has more digits
C
The hundreds place is different
D
Both numbers are equal
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
The comparison must check the tens place before the ones place; 9 tens (90) is greater than 0 tens (0)
Step-by-Step Explanation:
Place value comparison prioritizes higher places: 809 has 0 tens, while 890 has 9 tens.
21
Short Answer
Medium
1 Mark
Sam says: 'In the number 6,432, the digit 6 has a face value of 6,000.' What is Sam's mistake?
A
Face value is just 6; 6,000 is its place value
B
6 has no face value
C
The face value is 600
D
Sam is completely correct
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Face value is just 6; 6,000 is its place value
Step-by-Step Explanation:
Face value is the digit itself (6). Place value accounts for position (6 × 1,000 = 6,000).
22
Fill in the Blanks
Medium
1 Mark
Complete the inequality: 3,450 < [ ? ] < 3,490
A
3,475
B
3,440
C
3,500
D
3,405
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,475
Step-by-Step Explanation:
3,475 is between 3,450 and 3,490.
23
Fill in the Blanks
Medium
1 Mark
Find the missing digit to make the statement true: 5,6[ ? ]4 > 5,674
A
8
B
7
C
6
D
5
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
8
Step-by-Step Explanation:
To make 5,6_4 > 5,674, the tens digit must be strictly greater than 7 (so 8 or 9).
24
Short Answer
Medium
1 Mark
A car dealership sold 1,425 cars in Year 1, 1,452 cars in Year 2, and 1,245 cars in Year 3. Order the years from greatest sales to least sales:
A
Year 2 (1,452), Year 1 (1,425), Year 3 (1,245)
B
Year 1, Year 2, Year 3
C
Year 3, Year 1, Year 2
D
Year 2, Year 3, Year 1
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Year 2 (1,452), Year 1 (1,425), Year 3 (1,245)
Step-by-Step Explanation:
1,452 > 1,425 > 1,245. Descending order is Year 2, Year 1, Year 3.
25
Short Answer
Medium
1 Mark
Two mountain trails measure 3,850 meters and 3,580 meters. Which trail is longer, and by how many meters?
A
3,850 m trail is longer by 270 meters
B
3,580 m trail is longer
C
Both trails are equal
D
3,850 m trail is longer by 170 meters
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,850 m trail is longer by 270 meters
Step-by-Step Explanation:
3,850 > 3,580. Difference = 3,850 - 3,580 = 270 meters.
26
Short Answer
Medium
1 Mark
At the School Charity Fundraisers, four teams recorded scores: Team A (5600), Team B (5240), Team C (5900), Team D (5090). Which team scored the lowest?
A
Team with 5090
B
Team with 5900
C
Team with 5240
D
Team with 5600
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Team with 5090
Step-by-Step Explanation:
The lowest score is 5090.
27
Multiple Choice
Easy
1 Mark
What is the face value of the digit 4 in 6,482?
A
4
B
400
C
40
D
4,000
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
4
Step-by-Step Explanation:
The face value of any digit is the digit itself: 4.
28
Multiple Choice
Easy
1 Mark
Which of the following numbers is the LARGEST?
A
5900
B
5090
C
5240
D
5600
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
5900
Step-by-Step Explanation:
5900 has the greatest value.
29
Multiple Choice
Easy
1 Mark
Which symbol correctly completes the comparison: 5600 [ ? ] 5240
A
>
B
<
C
=
D
+
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
5600 is greater than 5240.
30
Multiple Choice
Easy
1 Mark
What is the place value of the digit 7 in the number 7,425?
A
7,000
B
700
C
70
D
7
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
7,000
Step-by-Step Explanation:
7 is in the thousands place, so its place value is 7,000.
31
Short Answer
Hard
2 Marks
I am a 4-digit number between 7,000 and 8,000. All four of my digits are odd and different. The sum of my digits is 16. What number am I?
A
7,135
B
7,351
C
7,531
D
7,315
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
7,135
Step-by-Step Explanation:
Thousands = 7. Remaining sum = 16 - 7 = 9. Distinct odd digits summing to 9: 1 + 3 + 5 = 9. Possible number is 7,135 (or 7,351, 7,531).
32
Short Answer
Hard
2 Marks
Using digits 5, 0, 8, 3 without repeating any digit, what is the SMALLEST 4-digit number you can form?
A
3,058
B
0,358
C
3,508
D
3,085
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,058
Step-by-Step Explanation:
Zero cannot be the leading thousands digit. Place smallest non-zero digit (3) first, then 0 in hundreds: 3,058.
33
Short Answer
Hard
2 Marks
If you swap the hundreds and tens digits in the number 4,720, how does the value of the number change?
A
It becomes 4,270, which is 450 less than the original number
B
It becomes 4,702
C
The value stays the same
D
It increases by 500
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
It becomes 4,270, which is 450 less than the original number
Step-by-Step Explanation:
Original = 4,720. Swapped = 4,270. Difference = 4,720 - 4,270 = 450 decrease.
34
Short Answer
Hard
2 Marks
Why is any 4-digit number automatically greater than any 3-digit number?
A
A 4-digit number has at least 1 thousand (1,000+), while the greatest possible 3-digit number is only 999
B
Because 4 is an even number
C
Because 3-digit numbers cannot have zeroes
D
Only when both numbers are odd
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
A 4-digit number has at least 1 thousand (1,000+), while the greatest possible 3-digit number is only 999
Step-by-Step Explanation:
The minimum 4-digit number is 1,000, which exceeds the maximum 3-digit number (999).
35
Short Answer
Medium
1 Mark
A student compares 4,809 and 4,890 and writes '4,809 > 4,890' because 9 ones is greater than 0 ones. Why is this reasoning flawed?
A
The comparison must check the tens place before the ones place; 9 tens (90) is greater than 0 tens (0)
B
4,809 has more digits
C
The hundreds place is different
D
Both numbers are equal
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
The comparison must check the tens place before the ones place; 9 tens (90) is greater than 0 tens (0)
Step-by-Step Explanation:
Place value comparison prioritizes higher places: 809 has 0 tens, while 890 has 9 tens.
36
Short Answer
Medium
1 Mark
Sam says: 'In the number 6,432, the digit 6 has a face value of 6,000.' What is Sam's mistake?
A
Face value is just 6; 6,000 is its place value
B
6 has no face value
C
The face value is 600
D
Sam is completely correct
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Face value is just 6; 6,000 is its place value
Step-by-Step Explanation:
Face value is the digit itself (6). Place value accounts for position (6 × 1,000 = 6,000).
37
Fill in the Blanks
Medium
1 Mark
Complete the inequality: 3,450 < [ ? ] < 3,490
A
3,475
B
3,440
C
3,500
D
3,405
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,475
Step-by-Step Explanation:
3,475 is between 3,450 and 3,490.
38
Fill in the Blanks
Medium
1 Mark
Find the missing digit to make the statement true: 5,6[ ? ]4 > 5,674
A
8
B
7
C
6
D
5
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
8
Step-by-Step Explanation:
To make 5,6_4 > 5,674, the tens digit must be strictly greater than 7 (so 8 or 9).
39
Short Answer
Medium
1 Mark
A car dealership sold 1,425 cars in Year 1, 1,452 cars in Year 2, and 1,245 cars in Year 3. Order the years from greatest sales to least sales:
A
Year 2 (1,452), Year 1 (1,425), Year 3 (1,245)
B
Year 1, Year 2, Year 3
C
Year 3, Year 1, Year 2
D
Year 2, Year 3, Year 1
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Year 2 (1,452), Year 1 (1,425), Year 3 (1,245)
Step-by-Step Explanation:
1,452 > 1,425 > 1,245. Descending order is Year 2, Year 1, Year 3.
40
Short Answer
Medium
1 Mark
Two mountain trails measure 3,850 meters and 3,580 meters. Which trail is longer, and by how many meters?
A
3,850 m trail is longer by 270 meters
B
3,580 m trail is longer
C
Both trails are equal
D
3,850 m trail is longer by 170 meters
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,850 m trail is longer by 270 meters
Step-by-Step Explanation:
3,850 > 3,580. Difference = 3,850 - 3,580 = 270 meters.
41
Short Answer
Medium
1 Mark
At the Warehouse Inventory Batches, four teams recorded scores: Team A (7400), Team B (7150), Team C (7800), Team D (7050). Which team scored the lowest?
A
Team with 7050
B
Team with 7800
C
Team with 7150
D
Team with 7400
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Team with 7050
Step-by-Step Explanation:
The lowest score is 7050.
42
Multiple Choice
Easy
1 Mark
What is the face value of the digit 4 in 6,482?
A
4
B
400
C
40
D
4,000
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
4
Step-by-Step Explanation:
The face value of any digit is the digit itself: 4.
43
Multiple Choice
Easy
1 Mark
Which of the following numbers is the LARGEST?
A
7800
B
7050
C
7150
D
7400
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
7800
Step-by-Step Explanation:
7800 has the greatest value.
44
Multiple Choice
Easy
1 Mark
Which symbol correctly completes the comparison: 7400 [ ? ] 7150
A
>
B
<
C
=
D
+
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
7400 is greater than 7150.
45
Multiple Choice
Easy
1 Mark
What is the place value of the digit 7 in the number 7,425?
A
7,000
B
700
C
70
D
7
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
7,000
Step-by-Step Explanation:
7 is in the thousands place, so its place value is 7,000.
46
Short Answer
Hard
2 Marks
I am a 4-digit number between 7,000 and 8,000. All four of my digits are odd and different. The sum of my digits is 16. What number am I?
A
7,135
B
7,351
C
7,531
D
7,315
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
7,135
Step-by-Step Explanation:
Thousands = 7. Remaining sum = 16 - 7 = 9. Distinct odd digits summing to 9: 1 + 3 + 5 = 9. Possible number is 7,135 (or 7,351, 7,531).
47
Short Answer
Hard
2 Marks
Using digits 5, 0, 8, 3 without repeating any digit, what is the SMALLEST 4-digit number you can form?
A
3,058
B
0,358
C
3,508
D
3,085
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3,058
Step-by-Step Explanation:
Zero cannot be the leading thousands digit. Place smallest non-zero digit (3) first, then 0 in hundreds: 3,058.
48
Short Answer
Hard
2 Marks
If you swap the hundreds and tens digits in the number 4,720, how does the value of the number change?
A
It becomes 4,270, which is 450 less than the original number
B
It becomes 4,702
C
The value stays the same
D
It increases by 500
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
It becomes 4,270, which is 450 less than the original number
Step-by-Step Explanation:
Original = 4,720. Swapped = 4,270. Difference = 4,720 - 4,270 = 450 decrease.
49
Short Answer
Hard
2 Marks
Why is any 4-digit number automatically greater than any 3-digit number?
A
A 4-digit number has at least 1 thousand (1,000+), while the greatest possible 3-digit number is only 999
B
Because 4 is an even number
C
Because 3-digit numbers cannot have zeroes
D
Only when both numbers are odd
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
A 4-digit number has at least 1 thousand (1,000+), while the greatest possible 3-digit number is only 999
Step-by-Step Explanation:
The minimum 4-digit number is 1,000, which exceeds the maximum 3-digit number (999).
50
Short Answer
Medium
1 Mark
A student compares 4,809 and 4,890 and writes '4,809 > 4,890' because 9 ones is greater than 0 ones. Why is this reasoning flawed?
A
The comparison must check the tens place before the ones place; 9 tens (90) is greater than 0 tens (0)
B
4,809 has more digits
C
The hundreds place is different
D
Both numbers are equal
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Correct Answer:
The comparison must check the tens place before the ones place; 9 tens (90) is greater than 0 tens (0)
Step-by-Step Explanation:
Place value comparison prioritizes higher places: 809 has 0 tens, while 890 has 9 tens.