Lesson 2.2: Counting Forward and Backward
Fluency in forward and backward number sequences.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
#CountingForwardBackward #NumberLine100 #Sequencing
Counting Forward and Backward up to 100
Just like climbing up stairs and walking back down, we can count forward to increase numbers and backward to decrease them.
Hundred Chart Hop (Counting Forward & Backward)
47
48
49
50
51
Number Name: Forty-Nine (49) comes right after Forty-Eight (48)
Numbers 1 to 100: Reading, writing, and sequencing two-digit numbers.
1. Counting Forward (Ascending)
Counting forward means adding 1 each time: 67, 68, 69, 70, 71. Look closely at what happens when crossing a decade: after 69 comes 70, after 79 comes 80!
Try It: Count forward starting from 88: 88, 89, 90, 91, 92!
2. Counting Backward (Countdown)
When counting backward, we take away 1 each time. Just like a rocket launch countdown: 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, Blast off! In Grade 2, we practice counting back from any two-digit number: 53, 52, 51, 50, 49, 48.
Watch Out: What comes before 50 when counting back? 49!
💡 Key Learning Takeaways
- Counting forward increases values by 1.
- Counting backward decreases values by 1.
- Master crossing decades: 40 -> 39, 70 -> 69.
🎯 Key Learning Takeaways
Forward and backward counting.
📄 Printable Worksheets (10 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
WL-G2-C02-W10
A4 • 15 Qs
Numbers 1–100 — Worksheet 10
Curriculum Excellence & Final Review
WL-G2-C02-W09
A4 • 15 Qs
Numbers 1–100 — Worksheet 9
Mastery Assessment & Progress Check
WL-G2-C02-W08
A4 • 15 Qs
Numbers 1–100 — Worksheet 8
Mixed Review & Reinforcement
WL-G2-C02-W07
A4 • 15 Qs
Numbers 1–100 — Worksheet 7
Everyday Applications & Story Maths
WL-G2-C02-W06
A4 • 15 Qs
Numbers 1–100 — Worksheet 6
Critical Thinking & Deep Understanding
WL-G2-C02-W05
A4 • 15 Qs
Numbers 1–100 — Worksheet 5
Speed Challenge & Quick Check
WL-G2-C02-W04
A4 • 15 Qs
Numbers 1–100 — Worksheet 4
Problem Solving & Real-Life Stories
WL-G2-C02-W03
A4 • 15 Qs
Numbers 1–100 — Worksheet 3
Hands-on Visual Activity & Matching
WL-G2-C02-W02
A4 • 15 Qs
Numbers 1–100 — Worksheet 2
Essential Practice & Skill Builder
WL-G2-C02-W01
A4 • 15 Qs
Numbers 1–100 — Worksheet 1
Foundational Concepts & Visual Exploration
✍️ Lesson Practice Questions (50 Questions)
Solve these real-world challenges online, test your understanding, and reveal instant step-by-step explanations.
1
Multiple Choice
Hard
1 Mark
What is the difference between (48 + 10) and (21 + 10)?
A
21
B
27
C
37
D
48
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
27
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (48 + 10) - (21 + 10) = 48 - 21 = 27.
2
Multiple Choice
Hard
1 Mark
A secret number plus 27 equals 48. If you double the secret number, what is the result?
A
21
B
23
C
96
D
42
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
42
Step-by-Step Explanation:
The secret number is 21. Doubling it gives 21 × 2 = 42.
3
Multiple Choice
Hard
1 Mark
If 21 + 27 = 48, what is 27 + 21?
A
48
B
49
C
27
D
21
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
48
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
4
Multiple Choice
Hard
1 Mark
Why is 48 greater than 21?
A
Numbers ending in 0 are always smaller
B
Because 48 includes 21 plus an additional 27 items
C
Because {tot} has a bigger first digit
D
Because {v1} is an even number
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 48 includes 21 plus an additional 27 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
5
Multiple Choice
Medium
1 Mark
Sam evaluated 48 - 27 and wrote 75. What was Sam's mistake?
A
He divided the numbers
B
He forgot the units place
C
He multiplied by 2
D
He added instead of subtracting
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.
6
Multiple Choice
Medium
1 Mark
A student claimed that 21 + 27 = 58 because 'we must add 10 to every answer'. Why is this student wrong?
A
The answer is 0
B
Addition means combining only the given numbers without adding extra amounts
C
Addition is only for 1-digit numbers
D
The student subtracted instead
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
21 + 27 equals exactly 48.
7
Multiple Choice
Medium
1 Mark
Complete the pattern: 21, 26, 31, [ ? ].
A
35
B
36
C
33
D
41
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
36
Step-by-Step Explanation:
The pattern increases by 5. 31 + 5 = 36.
8
Multiple Choice
Medium
1 Mark
Find the missing number: 21 + [ ? ] = 48.
A
26
B
21
C
27
D
28
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
27
Step-by-Step Explanation:
Missing value is 27 because 21 + 27 = 48.
9
Multiple Choice
Medium
1 Mark
In a school garden, there are 21 yellow marigolds and 27 purple petunias. How many flowers are blooming in total?
A
27 flowers
B
21 flowers
C
48 flowers
D
53 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
48 flowers
Step-by-Step Explanation:
21 + 27 = 48 flowers.
10
Multiple Choice
Medium
1 Mark
A school library received 48 new graphic novels. Students checked out 27 novels on Monday. How many new novels are still on the shelf?
A
27 novels
B
21 novels
C
22 novels
D
48 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
21 novels
Step-by-Step Explanation:
48 - 27 = 21 novels remaining.
11
Multiple Choice
Medium
1 Mark
A baker packed 21 apple pies in the morning and 27 cherry pies in the afternoon. How many pies did the baker pack in all?
A
46 pies
B
21 pies
C
48 pies
D
50 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
48 pies
Step-by-Step Explanation:
21 + 27 = 48 pies in total.
12
Multiple Choice
Easy
1 Mark
What number is 10 more than 21?
A
22
B
11
C
41
D
31
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
31
Step-by-Step Explanation:
21 + 10 = 31.
13
Multiple Choice
Easy
1 Mark
Which comparison is correct: 48 [ ? ] 43?
A
>
B
=
C
<
D
≈
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
48 is greater than 43.
14
Multiple Choice
Easy
1 Mark
Calculate: 48 - 27 = ?
A
27
B
20
C
22
D
21
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
21
Step-by-Step Explanation:
48 - 27 = 21.
15
Multiple Choice
Easy
1 Mark
In Chapter 'Numbers 1–100', calculate: 21 + 27 = ?
A
47
B
58
C
48
D
49
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
48
Step-by-Step Explanation:
21 + 27 = 48.
16
Multiple Choice
Hard
1 Mark
What is the difference between (73 + 10) and (49 + 10)?
A
73
B
24
C
49
D
34
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
24
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (73 + 10) - (49 + 10) = 73 - 49 = 24.
17
Multiple Choice
Hard
1 Mark
A secret number plus 24 equals 73. If you double the secret number, what is the result?
A
98
B
51
C
49
D
146
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
98
Step-by-Step Explanation:
The secret number is 49. Doubling it gives 49 × 2 = 98.
18
Multiple Choice
Hard
1 Mark
If 49 + 24 = 73, what is 24 + 49?
A
49
B
74
C
73
D
24
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
73
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
19
Multiple Choice
Hard
1 Mark
Why is 73 greater than 49?
A
Because {v1} is an even number
B
Because {tot} has a bigger first digit
C
Because 73 includes 49 plus an additional 24 items
D
Numbers ending in 0 are always smaller
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 73 includes 49 plus an additional 24 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
20
Multiple Choice
Medium
1 Mark
Sam evaluated 73 - 24 and wrote 97. What was Sam's mistake?
A
He forgot the units place
B
He added instead of subtracting
C
He multiplied by 2
D
He divided the numbers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.
21
Multiple Choice
Medium
1 Mark
A student claimed that 49 + 24 = 83 because 'we must add 10 to every answer'. Why is this student wrong?
A
Addition means combining only the given numbers without adding extra amounts
B
Addition is only for 1-digit numbers
C
The student subtracted instead
D
The answer is 0
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
49 + 24 equals exactly 73.
22
Multiple Choice
Medium
1 Mark
Complete the pattern: 49, 54, 59, [ ? ].
A
69
B
63
C
61
D
64
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
64
Step-by-Step Explanation:
The pattern increases by 5. 59 + 5 = 64.
23
Multiple Choice
Medium
1 Mark
Find the missing number: 49 + [ ? ] = 73.
A
23
B
24
C
25
D
49
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
24
Step-by-Step Explanation:
Missing value is 24 because 49 + 24 = 73.
24
Multiple Choice
Medium
1 Mark
In a school garden, there are 49 yellow marigolds and 24 purple petunias. How many flowers are blooming in total?
A
49 flowers
B
24 flowers
C
73 flowers
D
78 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
73 flowers
Step-by-Step Explanation:
49 + 24 = 73 flowers.
25
Multiple Choice
Medium
1 Mark
A school library received 73 new graphic novels. Students checked out 24 novels on Monday. How many new novels are still on the shelf?
A
49 novels
B
50 novels
C
73 novels
D
24 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
49 novels
Step-by-Step Explanation:
73 - 24 = 49 novels remaining.
26
Multiple Choice
Medium
1 Mark
A baker packed 49 apple pies in the morning and 24 cherry pies in the afternoon. How many pies did the baker pack in all?
A
49 pies
B
71 pies
C
75 pies
D
73 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
73 pies
Step-by-Step Explanation:
49 + 24 = 73 pies in total.
27
Multiple Choice
Easy
1 Mark
What number is 10 more than 49?
A
50
B
39
C
59
D
69
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
59
Step-by-Step Explanation:
49 + 10 = 59.
28
Multiple Choice
Easy
1 Mark
Which comparison is correct: 73 [ ? ] 68?
A
≈
B
>
C
<
D
=
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
73 is greater than 68.
29
Multiple Choice
Easy
1 Mark
Calculate: 73 - 24 = ?
A
49
B
50
C
24
D
48
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
49
Step-by-Step Explanation:
73 - 24 = 49.
30
Multiple Choice
Easy
1 Mark
In Chapter 'Numbers 1–100', calculate: 49 + 24 = ?
A
83
B
74
C
72
D
73
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
73
Step-by-Step Explanation:
49 + 24 = 73.
31
Multiple Choice
Hard
1 Mark
What is the difference between (63 + 10) and (42 + 10)?
A
42
B
31
C
63
D
21
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
21
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (63 + 10) - (42 + 10) = 63 - 42 = 21.
32
Multiple Choice
Hard
1 Mark
A secret number plus 21 equals 63. If you double the secret number, what is the result?
A
84
B
126
C
42
D
44
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
84
Step-by-Step Explanation:
The secret number is 42. Doubling it gives 42 × 2 = 84.
33
Multiple Choice
Hard
1 Mark
If 42 + 21 = 63, what is 21 + 42?
A
21
B
63
C
64
D
42
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
63
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
34
Multiple Choice
Hard
1 Mark
Why is 63 greater than 42?
A
Because {v1} is an even number
B
Because 63 includes 42 plus an additional 21 items
C
Numbers ending in 0 are always smaller
D
Because {tot} has a bigger first digit
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 63 includes 42 plus an additional 21 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
35
Multiple Choice
Medium
1 Mark
Sam evaluated 63 - 21 and wrote 84. What was Sam's mistake?
A
He forgot the units place
B
He multiplied by 2
C
He added instead of subtracting
D
He divided the numbers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.
36
Multiple Choice
Medium
1 Mark
A student claimed that 42 + 21 = 73 because 'we must add 10 to every answer'. Why is this student wrong?
A
Addition means combining only the given numbers without adding extra amounts
B
The answer is 0
C
The student subtracted instead
D
Addition is only for 1-digit numbers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
42 + 21 equals exactly 63.
37
Multiple Choice
Medium
1 Mark
Complete the pattern: 42, 47, 52, [ ? ].
A
56
B
54
C
57
D
62
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
57
Step-by-Step Explanation:
The pattern increases by 5. 52 + 5 = 57.
38
Multiple Choice
Medium
1 Mark
Find the missing number: 42 + [ ? ] = 63.
A
20
B
42
C
22
D
21
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
21
Step-by-Step Explanation:
Missing value is 21 because 42 + 21 = 63.
39
Multiple Choice
Medium
1 Mark
In a school garden, there are 42 yellow marigolds and 21 purple petunias. How many flowers are blooming in total?
A
63 flowers
B
42 flowers
C
21 flowers
D
68 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
63 flowers
Step-by-Step Explanation:
42 + 21 = 63 flowers.
40
Multiple Choice
Medium
1 Mark
A school library received 63 new graphic novels. Students checked out 21 novels on Monday. How many new novels are still on the shelf?
A
42 novels
B
21 novels
C
63 novels
D
43 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
42 novels
Step-by-Step Explanation:
63 - 21 = 42 novels remaining.
41
Multiple Choice
Medium
1 Mark
A baker packed 42 apple pies in the morning and 21 cherry pies in the afternoon. How many pies did the baker pack in all?
A
61 pies
B
65 pies
C
42 pies
D
63 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
63 pies
Step-by-Step Explanation:
42 + 21 = 63 pies in total.
42
Multiple Choice
Easy
1 Mark
What number is 10 more than 42?
A
32
B
52
C
62
D
43
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52
Step-by-Step Explanation:
42 + 10 = 52.
43
Multiple Choice
Easy
1 Mark
Which comparison is correct: 63 [ ? ] 58?
A
>
B
=
C
<
D
≈
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
63 is greater than 58.
44
Multiple Choice
Easy
1 Mark
Calculate: 63 - 21 = ?
A
43
B
42
C
21
D
41
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
42
Step-by-Step Explanation:
63 - 21 = 42.
45
Multiple Choice
Easy
1 Mark
In Chapter 'Numbers 1–100', calculate: 42 + 21 = ?
A
73
B
63
C
62
D
64
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
63
Step-by-Step Explanation:
42 + 21 = 63.
46
Multiple Choice
Hard
1 Mark
What is the difference between (53 + 10) and (35 + 10)?
A
53
B
18
C
35
D
28
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
18
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (53 + 10) - (35 + 10) = 53 - 35 = 18.
47
Multiple Choice
Hard
1 Mark
A secret number plus 18 equals 53. If you double the secret number, what is the result?
A
106
B
37
C
35
D
70
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
70
Step-by-Step Explanation:
The secret number is 35. Doubling it gives 35 × 2 = 70.
48
Multiple Choice
Hard
1 Mark
If 35 + 18 = 53, what is 18 + 35?
A
18
B
35
C
54
D
53
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
53
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
49
Multiple Choice
Hard
1 Mark
Why is 53 greater than 35?
A
Numbers ending in 0 are always smaller
B
Because {tot} has a bigger first digit
C
Because {v1} is an even number
D
Because 53 includes 35 plus an additional 18 items
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 53 includes 35 plus an additional 18 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
50
Multiple Choice
Medium
1 Mark
Sam evaluated 53 - 18 and wrote 71. What was Sam's mistake?
A
He added instead of subtracting
B
He divided the numbers
C
He multiplied by 2
D
He forgot the units place
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.