Ordering of numbers
Ordering of numbers
Travel Through
Kavitha arranged her toys in an order as shown below. Guess the order of her arrangement.
Keywords: Ascending order, Descending Order
Learn
Arrangement in alphabetical order
We can arrange the names of things in alphabetical order.
Alphabetical order: Apple, Ball, Cap, Doll, Eggs, Fan, Gift
Practice
Arrange the given things in alphabetical order and fill in the blanks.
Book, Cup, Eraser, Fish, Gum, Jar, Kite, Lock,
Teacher’s Note: Teacher can extend the above activity for different objects.
Try This
Write the names of your classmates in strips. Arrange them in alphabetical order.
Teacher’s Note: Teacher can guide students if two or more names begin with same alphabet.
Learn
Ascending and descending order
Ascending or increasing order
The bananas are arranged by counts.
The numbers have been arranged from the smallest to the biggest.
This order of arrangement is called ‘Ascending order’.
Descending or decreasing order
The numbers have been arranged from the biggest to the smallest.
This order of arrangement is called ‘Descending order‛.
The oranges in the plates are arranged by counts. We can arrange the plates according to the number of oranges in them.
Ascending order: 5,7,9,10.
Descending order: 10,9,7,5.
Practice
1. Count the given things and write them in the boxes. Arrange in ascending and descending orders.
(i)
Answer : 13, 8, 10, 12
Ascending order : 8, 10, 12, 13
Descending order : 13, 12, 10, 8
(ii)
Answer : 10, 12, 6, 8
Ascending order : 6, 8, 10, 12
Descending order : 12, 10, 8, 6
2. Write the following numbers in ascending and descending order.
(i) 9,5,7,3
Ascending order : 3, 5, 7, 9
Descending order : 9, 7, 5, 3
(ii) 4,12,15,17
Ascending order : 4, 12, 15, 17
Descending order : 17, 15, 12, 4
(iii) 8,6,10,3
Ascending order : 3, 6, 8, 10
Descending order : 10, 8, 6, 3
Learn
Arrange the given numbers in ascending and descending order:
34, 67, 84, 27, 49.
To arrange the given numbers in ascending order, let us look at the digits in tens places 34, 67, 84, 27, 49 and arrange them. 2 tens is the smallest among these and next is 3 tens followed by 4 tens 6 tens and 8 tens. So, we can arrange the numbers from smallest to the biggest as given below.
Ascending order = 27, 34, 49, 67, 84.
To arrange the numbers in descending order we arrange the numbers from biggest to smallest.
Descending order = 84, 67, 49, 34, 27.
Practice
Write the numbers in ascending and descending orders.
(i) 12, 24, 35, 17, 9.
Ascending : 9, 12, 17, 24, 35
Descending : 35, 24, 17, 12, 9
(ii) 39, 70, 44, 86, 71.
Ascending : 39, 44, 70, 71, 86
Descending : 86, 71, 70, 44, 39
(iii) 94, 81, 90, 70, 69.
Ascending : 69, 70, 81, 90, 94
Descending : 94, 90, 81, 70, 69
(iv) 73, 54, 87, 17, 42.
Ascending : 17, 42, 54, 73, 87
Descending : 87, 73, 54, 42, 17
Activity
Classroom activity
* Take cards with numbers written from 0-9.
* Divide the class into two groups. Three children from one group take cards with numbers. Say 3, 2, 5 and make as many two-digit numbers as possible.
* The next group of children shall arrange the numbers formed in ascending and descending order.
Try This
Fill in the flower pots using given numbers only once.
72, 17, 88, 15, 93, 10, 60, 53, 21, 44, 39, 78, 65, 49.
(i) Write the ascending order of numbers beginning with 21.
21, 39, 44, 49, 53, 60, 65
(ii) Write the descending order of numbers starting with 88.
88, 78, 72, 65, 60, 53, 49