Page 18 - Math Skill - 5

16 Maths

Let’s Attempt

Example: Arrange the following numbers in an ascending and descending order:
6,75,283; 5,28,386; 5,28,368; 2,83,189 and 7,83,859.

Solution: All the numbers have 6-digits, so we start comparison from the digits at extreme
left place.
Start comparison from the left-most digits. It shows that 2 < 5 (for both 5,28,368
and 5,28,386) 5 < 6 < 7. L TTh Th H T O

Therefore, 2,83,189 < 5,28,386 and 6 7 5 2 8 3
5,28,368 < 6,75,283 < 7,83,859.
It is clear that now we have only two numbers, i.e., 5 2 8 3 8 6
5,28,386 and 5,28,368 left for comparison. Cross 5 2 8 3 6 8
out equal digits at corresponding places from both 2 8 3 1 8 9
numbers. We find that, at tens place 6 < 8. 7 8 3 8 5 9
Therefore; 5,28,368 < 5,28,386.
2 < 5
So, the required ascending order is 5 < 6 < 7 6 < 8

2,83,189 < 5,28,368 < 5,28,386 < 6,75,283 < 7,83,859.
Now, the descending order is

7,83,859 > 6,75,283 > 5,28,386 > 5,28,368 > 2,83,189.

Exercise 1.5

1. Compare the numbers using ‘>’, ‘<’ or ’=’.

(a) 50,196 50,691 (b) 78,567 39,728 (c) 80,100 80,001

(d) 69,137 72,154 (e) 93,604 93,604 (f) 10,110 10,010

2. Which of the following numbers is the greatest?

(a) 10,49,178; 10,38,278; 15,39,128 (b) 31,20,567; 31,20,167; 3,12,667
3. Arrange the following numbers in ascending order.

(a) 53,34,52,159; 72,78,35,218; 76,61,52,831; 73,61,76,128 Challenge
(b) 78,15,289; 61,52,893; 18,87,359; 67,89,389 I am a number with seven digits,

(c) 6,52,361; 55,23,620; 85,125; 78,728 My first digit is 1,

4. Write the following numbers in descending order. But ‘I’ m the smallest one,
(a) 61,83,955; 68,78,599; 38,69,890; 79,62,387 Add a zero after me,

(b) 78,38,518; 79,38,596; 67,83,897; 61,83,968 What number am I?
(c) 57,98,32,891; 60,69,35,215; 56,96,38,356; 58,78,38,691