Keywords: Ascending order, Descending Order

__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: __A__pple, __B__all, __C__ap,
__D__oll, __E__ggs, __F__an,
__G__ift

__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:

34,6784,27,49.

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.**

**Answer
:**

Ascending
: 9, 12, 17, 24, 35

Descending : 35, 24, 17, 12, 9

**ii) 39,70,44,86,71.**

**Answer
:**

Ascending
: 39, 44, 70, 71, 86

Descending : 86, 71, 70, 44, 39

**iii)
94,81,90,70,69.**

**Answer
: **

Ascending
: 69, 70, 81, 90, 94

Descending
: 94, 90, 81, 70, 69

**iv) 73,54,87,17,42.**

**Answer
: **

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

Tags : Numbers | Term 2 Chapter 2 | 2nd Maths , 2nd Maths : Term 2 Unit 2 : Numbers

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail

2nd Maths : Term 2 Unit 2 : Numbers : Ordering of numbers | Numbers | Term 2 Chapter 2 | 2nd Maths

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