Lesson 2.1: Number Recognition, Reading, Writing and Number Names
Master numerals and spelling names from 1 to 100.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
#Numbers1to100 #NumberNames #ReadingWriting
Number Recognition, Reading, Writing & Number Names
Numbers are all around us — on clocks, house doors, price tags, and book pages! Let's explore how to read, write, and spell every number up to 100.
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. Writing Two-Digit Numbers
Every number from 10 to 99 is a two-digit number. The first digit shows tens and the second digit shows ones. For example, 74 has 7 tens and 4 ones.
Word Names: 20 = Twenty, 30 = Thirty, 40 = Forty, 50 = Fifty, 60 = Sixty, 70 = Seventy, 80 = Eighty, 90 = Ninety.
2. The Big Milestone: 100!
When we reach 99 and add 1 more, we get 100 (One Hundred). 100 is the smallest three-digit number, made of 10 tens!
Fun Fact: 100 has 1 hundred, 0 tens, and 0 ones.
💡 Key Learning Takeaways
- Two-digit numbers have a tens place and a ones place.
- Learn to spell number names accurately like Forty, Fifty, and Ninety.
- 100 is the first 3-digit number (10 tens).
🎯 Key Learning Takeaways
Number names up to 100.
📄 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.