Numbers | Term 3 Chapter 2 | 1st Maths - Numbers from 21 to 99 | 1st Maths : Term 3 Unit 2 : Numbers
Chapter: 1st Maths : Term 3 Unit 2 : Numbers
Numbers from 21 to 99
Numbers from 21 to 99
Keywords: Numbers, Forward, Backward, Skip count
Learn
10’s family
Teacher's Note: Teacher can make students to familiarize the above numbers with the help of locally available materials such as pebbles, seeds, beads, sticks etc.
Practice
Write the numbers.
Try this
Colour the boxes below for the given numbers.
Practice
Match the following.
Think like a Mathematician
Tick (✓) the odd one out.
Teacher's Note: The value of the number of items does not change in vertical or horizontal order.
Learn
Numbers from 21 to 30
Learn
Numbers from 31 to 40
Learn
Numbers from 41 to 50
Practice
Write the numbers.
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
Activity
Things needed
* 50 sticks (4 bundles in tens and 10 sticks.)
* Number cards 1 to 50.
Procedure
* Divide the class into two groups.
* Give sticks to one group and number cards to other group.
* One group has to show the number card and the other group has to show the sticks according to the number.
* The number card group has to check the number of sticks.
* Teacher has to facilitate the activity till the numbers get familiarised.
Try this
Count the shaded boxes and write the numbers below.
Colour the boxes according to the number.
Pleasure time
Write the missing numbers.
Learn
Numbers from 51 – 99
50 + 3 = 53
60 + 6 = 66
70 + 5 = 75
80 + 7 = 87
90 + 2 = 92
Learn
Numbers from 51 – 99
Practice
Write the numbers.
Try this
How many laddus? How many eggs?
Game
Number wheels
Things needed
* Number wheels as shown in the figure.
* 99 Beads / seeds / sticks (Locally available materials) - 2 sets.
Procedure
* Divide the class into 2 groups and give 99 beads/seeds/sticks to each group.
* Call one student from each group to form a number by rotating the spin wheels.
* The respective group has to arrange the beads/seeds/sticks in tens and ones according to the number obtained.
Example: If the first group obtains the number 34, they have to arrange 3 tens and 4 ones.
* Continue the process among groups for other numbers.
* Let them compare the numbers obtained in both groups to say which is bigger and smaller.
Think like a Mathematician
Complete the number chart.
Write the numbers starting with 2 : 2 20 21 22 23 24 25 26 27 28 29
Write the numbers starting with 6 : 6 61 62 63 64 65 66 67 68 69
Write the numbers ending with 1 :
Write the numbers ending with 4 :
Colour the boxes in the above number chart wherever the same number occurs twice. Write them in the boxes given below.
Complete the pattern.
a. 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
b. 5, 15, 25, 35, 45, 55, 65, 75, 85, 95
C. 3, 13, 23, 33, 43, 53, 63, 73, 83, 93
Pleasure time
Write the missing numbers by forward counting.
Write the missing numbers by backward counting.
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