In comparison of numbers we will learn to compare 4-digit numbers. The same rules are applied to compare numbers having more than 4 digits.
How to learn and understand comparison of numbers?
Rules for Comparison of Numbers:
Rule I: We know that a number with more digits is always greater than the number with less number of digits.
Rule II: When the two numbers have the same number of digits, we start comparing the digits from left most place until we come across unequal digits.
To learn and understand comparison of numbers the rules are generalized here:
Rule (1): The number/numeral having more digits is greater.
We know that a number with more digits is always greater than the number with less number of digits.
(i) The number of 2 digits is greater than the number of one digit.
(ii) The number of 3 digits is greater than the number having 2 or 1 digit.
(iii) The number of 4 digits is greater than 3 or 2 or 1 digit number.
(iv) 5-digit number > 4-digit number > 3-digit number ………… etc.
(v) 6-digit number > 5-digit number > 4-digit number ………… etc.
As:
10 > 9;
35 > 8;
100 > 99 > 9;
124 > 35;
239 > 98;
1250 > 998;
1291 > 948;
23051 > 8735;
24,692 > 4,600
351246 > 92835 > 5298 > 376 > 93.
Example:
Which is greater?
(i) 20,36,15,589 or 6,59,76,456
(ii) 40,201 or 4,999
(iii) 1,29,081 or 90,281
Solution:
(i) 20,36,15,589 or 6,59,76,456
The number 20,36,15,589 has 9-digits and 6,59,76,456 has 8-digits.
So, 20,36,15,589 > 6,59,76,456
(ii) 40,201 or 4,999
40,201 has 5 digits and 4,999 has 4 digits.
So,
40,201 > 4,999
(iii) 1,29,081 or 90,281
1,29,081 has 6 digits and 90,281 has 5 digits.
So, 1,29,081 > 90,281
Rule (2):
(a) If two numbers have the same number of digits, we compare
them on the basis of their extreme left digits. The number with the
greater extreme left digit is greater.
As:
(i) 514 > 298, because 5 > 2
(ii) 6138 > 5978, because 6 > 5
(iii) 32516 > 19768, because 3 > 1
(iv) 451926 > 351658, because 4 > 3
(b) If the extreme left digits of two numbers are the same, we
compare them on the basis of the next digits towards their right and so
on.
As:
(i) 64283 > 63198, because 6 = 6, but 4 > 3
(ii) 24567 > 22381, because 2 = 2, but 4 > 2
(iii) 83,643 > 83,449, because 83 = 83, but 6 > 4
(iv) 367825 > 367543, because 367 = 367, but 8 > 5
In other words;
When the two numbers have the same number of digits, we start comparing the digits from the left most place until we come across unequal digits.
For example:
Compare 29,384 and 20,364
Both numbers are 5-digit numbers.
Let us compare the digits in left most place, we find that both numbers have same digit. Next, we compare the digits in the second most left place, we find that 9> 0.
So, 29,384 > 20,364
These are the rules to teach comparison of numbers. Parents and teachers can also follow these rules to teach the students how to compare numbers.
Follow the below link to understand the examples on comparison of numbers.
Solved Examples of Comparison of Numbers:
A number having the greater number of digits is the greater number.
1. Compare 69,56,16,430 and 69,37,82,890
Solution:
Both numbers have same numbers of digits.
Let us compare the digits in the left most place, we find the both numbers have same digits in ten-crores and crores place. Next, we compare the digits at ten-lakhs place. Here 5 > 3.
Thus, 69,56,16,430 > 69,37,82,890.
2. Compare:
(a) 8 and 12.
8 is a single digit number. 12 has two digits.
8 < 12
(b) 1342 and 342
The number of digits in 1342 is greater than the number of digits in 342.
1342 > 342
If two numbers have the same number of digits, then line up the digits according to place value. Compare the digits beginning with the greatest place.
3. Compare:
(a) 5869 and 4369
5 > 4
So, 5869 > 4369
(b) 74186 and 74586
7 = 7
4 = 4
1 < 5
So, 74586 > 74186
When two numbers have different numbers of digits the number with the greater number of digits will be the greater:
4. Which is the greater?
(i) 5,12,964 or 291 ((ii) 1, 56 ,201 or 27,193
Solution:
(i) 5,12,964 has 6 digits and 291 has 3 digits.
So, 5,12,964 is greater than 291 or ,12,964 > 291
(ii) 1,56,201 has 6 digits and 27.193 has 5 digits.
So, 1,56,201 is greater than 27,193 or 1.56, 201 > 27.193
When the two numbers have the same number of digits: In this case, we proceed as follows:
Step I: First compare the digits at the left-most place in both the numbers. If they are not equal then the number which has the greater digit at this place is greater than the other.
Step II: If they are equal, then compare the second digits from left in both the numbers. If they are not equal then the number which has the greater digit at this place is greater than the other.
Step III: If they are equal in value, we compare their third digits from the left. Continue this process until we come across unequal digits at the corresponding places.
5. Compare:
(i) 35,306 and 35,419
(ii) 7,34,510 and 7,34,578
(i) Consider 35,306 and 35,419. Both are 5-digit numbers.
We start from the left-most digits. Here, 3 = 3.
Next, we compare the second digits from the left. Here, 5 = 5.
Next, we compare the third digits from the left. Here, 3 < 4
Thus, 35,306 < 35,419 or 35,419 > 35,306.
(ii) Consider 7,34,510 and 7,34,578. Both are 6-digit numbers.
Comparing the digits, we have
7 = 7 (left-most digits)
3 = 3 (second digits from the left)
4 = 4 (third digits from the left)
5 = 5 (fourth digits from the left)
1 < 7 (fifth digits from the left)
Thus, 7,34,510 < 7,34,578 or 7,34,578 > 7,34,510.
The numeral with more digits represents the greater number.
For example:
(i) 5,643 > 342
(ii) 11,896 < 121,543
To compare two numbers having the same number of digits we start comparing from the leftmost digit.
How we order the large numbers to compare one number with another number?
6. Compare 19,528 and 25,364
Compare the digits in the ten thousands place.
Since, 1 < 2
19528 < 25364
7. Compare 85,461 and 83,989
Both the numbers have 8 in the ten thousands place.
Therefore, compare the digits in the thousands place.
5 > 3
Therefore, 85,461 > 83,989
8. Compare 6,34,582 and 6,39,285
Both the numbers have 6 in the lakhs place and 3 in the ten thousands place.
So, compare the digits in the thousands place.
4 < 9
Therefore, 6,34,582 < 6,39,285
9. Form the smallest and biggest six digit numbers using the digits 3, 1, 5, 8, 7, 4
Arrange the digits in ascending order.
1, 3, 4, 5, 7, 8
Therefore, the smallest number is 1,34,578.
Arrange the digits in descending order.
8, 7, 5, 4, 3, 1
Therefore, the biggest number is 8,75,431.
Worksheet on Comparing and Ordering Numbers:
I. Put the right sign (<, > or =)
(i) 6,397 ………… 6,937
(ii) 27,839 ………… 25,899
(iii) 32,590 ………… 62,890
(iv) 4,15,296 ………… 4,27,866
(v) 6,32,700 ………… 6,32,200
(vi) 3,20,065 ………… 3,20,065
Answers:
I. (i) <
(ii) >
(iii) <
(iv) <
(v) >
(vi) =
II. Compare the numbers given below. Put > or < in the box.
(i) 384926 ........... 348962
(ii) 795642 ........... 759642
(iii) 562186 ........... 561286
(iv) 99909 ........... 99990
Answer:
II. (i) >
(ii) >
(iii) >
(iv) <
III. Fill in the blank using >, = or <:
(i) 2,63,149 _____ 5,92,500
(ii) 6,54,738 _____ 6,54,295
(iii) 4,651 _____ 79,514
(iv) 2,506 _____ 289
(v) 7,53,693 _____ 1,23,009
(vi) 66,329 _____ 9,51,780
(vii) 6,29,103 _____ 4,51,633
(viii) 1,520 _____ 624
(ix) 9,16,358 _____ 9,16,358
(x) 6,85,196 _____ 8,65,209
(xi) 95,163 _____ 6,510
(xii) 2,50,693 _____ 2,56,094
(xiii) 37,541 _____ 37,541
(xiv) 5,50,084 _____ 30,508
Answer:
III. (i) <
(ii) >
(iii) <
(iv) >
(v) >
(vi) <
(vii) >
(viii) >
(ix) =
(x) <
(xi) >
(xii) <
(xiii) =
(xiv) >
IV. Circle the right answer.
A. The greatest number among the given is:
(i) 89,306 (ii) 8,09,306 (iii) 8,09,606
B. The smallest number among the given is:
(i) 1,28,075 (ii) 2,18,057 (iii) 1,39,075
C. I want to buy a car with least price. Which one should I buy?
(i) $5,47,800 (ii) $4,99,900 (iii) 6,01,800
D. Given below is the population of 3 cities. The most populous city is:
(i) City A - 8,77,310 (ii) City B - 7,92,600 (iii) City C - 5,98,200
E. Given below is the distance of 3 towns from New York. The closest town is
(i) Town A - 8,65,015 m (ii) Town B - 8,65,880 m (iii) Town C - 8,70,009 m
Answers:
IV. A. (iii)
B. (i)
C. (ii)
D. (i)
E. (i)
V. Find the largest number in each group:
(i) 8,39,216; 8,93,162; 2,16,893; 6,89,312.
(ii) 3,70,621; 2,06,713; 6,30,271; 3,60,217.
(iii) 19,754; 45,791; 95,714; 71,459.
(iv) 5,320; 3,520; 2,530; 2,053.
Answer:
V. (i) 8,93,162
(ii) 6,30,271
(iii) 95,714
(iv) 5,320
VI. Find the smallest number in each group:
(i) 6,09,268; 6,90,286; 8,60,268; 6,90,624.
(ii) 2,51,673; 4,51,637; 3,51,768; 2,51,366.
(iii) 8,81,750; 8,91,750; 9,18,750; 8,18,570.
(iv) 47,30,172; 4,70,312; 4,07,312; 7,40,312.
Answer:
VI. (i) 6,09,268
(ii) 2,51,366
(iii) 8,18,570
(iv) 4,07,312
Related Concept
4th Grade Math Activities
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