Find the number that comes just before or just after a given number.
📖 Let Us Begin!
Ravi has a big jar of marbles. He wants to count them all. He starts from 1 and counts up to 100. Can you count with him? Numbers from 1 to 100 are all around us — on clocks, on pages, on houses! Let us learn to read, write, and use these numbers.
Counting Forward
We count forward when we go from a smaller number to a bigger number.
Example: 1, 2, 3, 4, 5 ... 98, 99, 100
After 45 comes 46. After 79 comes 80.
Counting Backward
We count backward when we go from a bigger number to a smaller number.
Example: 10, 9, 8, 7, 6, 5, 4, 3, 2, 1
Before 50 comes 49. Before 30 comes 29.
Before and After
The number just before a number is 1 less. The number just after a number is 1 more.
Example: Before 25 is 24. After 25 is 26.
Before 60 is 59. After 60 is 61.
📝 Key Words
Word
Meaning
Count forward
Going from a small number to a big number: 1, 2, 3...
Count backward
Going from a big number to a small number: 10, 9, 8...
Before
The number that comes just before (1 less)
After
The number that comes just after (1 more)
Number grid
A chart showing numbers 1 to 100 in rows
⭐ Key Points to Remember
Numbers 1 to 100 go in order: 1, 2, 3 ... 98, 99, 100.
Counting forward means going up: 1 more each time.
Counting backward means going down: 1 less each time.
The number just before is always 1 less.
The number just after is always 1 more.
✏️ Practice Questions
A. Fill in the Blanks
1. The number after 49 is .
2. The number before 71 is .
3. Count forward: 35, 36, 37, , .
4. Count backward: 20, 19, 18, , .
5. The number just after 99 is .
B. Choose the Correct Answer
1. Which number comes after 67?
a) 66b) 68c) 70
2. Which number comes before 40?
a) 41b) 39c) 38
3. What is the biggest number from 1 to 100?
a) 99b) 10c) 100
C. Short Answer
1. Write any five numbers between 50 and 60.
2. Count backward from 15 to 10. Write the numbers.
3. Meena says the number after 100 is 200. Is she right? What is the correct answer?
🎨 Activity: Number Grid Hunt
Draw a 10x10 grid on paper. Write numbers 1 to 100 in the boxes. Then colour all the numbers that end in 0 (10, 20, 30...) in red. What pattern do you see?
Want to use this as a worksheet? Switch to the A4 printable view.
Find the number that comes just before or just after a given number.
Let Us Begin!
Ravi has a big jar of marbles. He wants to count them all. He starts from 1 and counts up to 100. Numbers from 1 to 100 are all around us -- on clocks, on pages, on houses! Let us learn to read, write, and use these numbers.
Counting Forward and Backward
Counting Forward: We go from a smaller number to a bigger number. Each time we add 1.
Example: 1, 2, 3, 4, 5 ... After 45 comes 46. After 79 comes 80.
Counting Backward: We go from a bigger number to a smaller number. Each time we take away 1.
Example: 10, 9, 8, 7, 6 ... Before 50 comes 49. Before 30 comes 29.
Before and After
The number just before is 1 less. The number just after is 1 more.
Before 25 is 24. After 25 is 26. Before 60 is 59. After 60 is 61.
Number Grid (1 to 50)
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
Key Words
Word
Meaning
Count forward
Going from a small number to a big number: 1, 2, 3...
Count backward
Going from a big number to a small number: 10, 9, 8...
Before
The number that comes just before (1 less)
After
The number that comes just after (1 more)
Number grid
A chart showing numbers 1 to 100 in rows
Example
Before 36 is 35. After 36 is 37. Count forward from 36: 36, 37, 38, 39, 40.
Mathematics -- Class 2 (continued)
Topic: Numbers 1 to 100 -- Practice
Key Points to Remember
Numbers 1 to 100 go in order: 1, 2, 3 ... 98, 99, 100.
Counting forward means going up: 1 more each time.
Counting backward means going down: 1 less each time.
The number just before is always 1 less.
The number just after is always 1 more.
A. Fill in the Blanks
The number after 49 is .
The number before 71 is .
Count forward: 35, 36, 37, , .
Count backward: 20, 19, 18, , .
The number just after 99 is .
B. Choose the Correct Answer
Which number comes after 67?
a) 66b) 68c) 70
Which number comes before 40?
a) 41b) 39c) 38
What is the biggest number from 1 to 100?
a) 99b) 10c) 100
C. Short Answer
Write any five numbers between 50 and 60.
Count backward from 15 to 10. Write the numbers.
Meena says the number after 100 is 200. Is she right? What is the correct answer?
Activity: Number Grid Hunt
Draw a 10x10 grid on paper. Write numbers 1 to 100 in the boxes. Then colour all the numbers that end in 0 (10, 20, 30...) in red. What pattern do you see?