Keywords: Biggest, Smallest, Bigger, Smaller

__UNIT
2__

__Numbers__

** **

__Comparison and formation of numbers__

__Recall__

**Compare the
numbers**

i) Colour the bigger number in each of
the given pairs.

ii) Tick the smaller number
in each of the given pairs.

iii)
Connect the number which is equal to the given number
in each of the given groups.

**Keywords: **Biggest, Smallest, Bigger, Smaller

__Learn__

**Biggest and smallest number**

(i)
Let us compare the given two-digit numbers.

Take
the numbers 20, 70, 90

Here, 2 tens is less than 7 tens and 7 tens is
less than 9 tens.

So, 2 tens is the smallest
and 9 tens is
the biggest.

20 is the smallest number and 90 is
the biggest number.

(ii)
Let us compare the numbers which have same digits in the tens place 25, 23, 26

Here
the tens are equal. So we compare the ones. 23, 25, 26

Among 3, 5 and 6,

6 ones is the biggest and

3 ones is the smallest.

So, 26 is the biggest number and 23 is the smallest number.

(iii)
Let us compare the numbers which have different digits in both the places 25,
31, 40.

Though
the digits in ones place are different,

it has
no significance in the comparison of numbers.

So, it
is enough to compare the tens place: 25, 31, 40

4 tens is the biggest and
2 tens is the smallest.

So, 40 is
the biggest number and 25 is the smallest number.

__Practice__

**A. Circle
/ Underline the biggest number.**

i) 34,
35, ** 39**.

ii) 30,
** 80**, 50.

iii)
41, ** 79**, 19, 48.

iv) 62,
54, ** 76**, 67.

v) ** 75**, 57, 63, 36.

**B. Box/underline the smallest number.**

i) 70,
20, ** 10**.

ii) 89,
** 82**, 85.

iii)
35, 43, ** 17**, 29.

iv) 59,
51, ** 15**, 57.

v) 91, ** 19**, 96, 69.

**C. ****Choose the correct answer.**

1. 85 is the biggest number among ** 60, 85, 58**.

(i) 90, 74, 85

(ii) 60, 85, 58

2. Among 50, 40, 18 and 71 the smallest number is __18__

(i) 18

(ii) 71

(iii) 50

(iv) 42

3. Among 62,45,75
and 52 the biggest number is 62. __False__

(i) True

(ii) False

__Learn__

**Formation
of two-digit numbers**

Take 2 sets of
number cards.

One set from 0 to 9
and the other set from 10 to 90.

Call 2 children to
take one card from each set and form a two-digit number.

Formation
of two-digit numbers without repetition of digits.

Let us
consider the two-digit number 45. To form this number, we need to select the
cards ** 40** and

Let us
consider the two-digit number 54. To form the two-digit number 54 (digits
interchanged) we choose the cards ** 50**
and

Formation
of two-digit numbers with repetition of digits.

Let us
take the example of forming the two-digit number 66. Here we need to select the
cards 60 and 6.

Ask other children
to take different set of cards and to form various two-digit numbers with and
without repetition of digits.

__Practice__

Form
different two-digit numbers using the number cards given below. One is done for
you.

**i. Formation
of two-digit numbers with repetition of digits**

**ii. Formation of two-digit numbers without
repetition of digits**

__Try
This__

Take
2 dice and throw them. Note down the two-digit numbers (with and without
repetition) formed.

For
example, if the numbers seen on the face of the dice are 2 and 5, then the
different ways of forming two-digit numbers are shown.

** **

Using
the given numbers, form all possible two-digit numbers and complete the table.

__Pleasure
Time__

Complete
all possible two-digit numbers (with and without repetition of digits).

6, 8 : 6** 8**,

5, 7 : 5** 7**, 7

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

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2nd Maths : Term 2 Unit 2 : Numbers : Comparison and formation of numbers | Numbers | Term 2 Chapter 2 | 2nd Maths

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