Lesson 4.1: Numbers 10 to 20: Ten-Frames, Ordering & Number Names
Count 10-20, understand place value bundles of 10, and order numbers.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
#Numbers10to20 #TenFrame #BeforeAfterBetween
Numbers 10 to 20: Making a Ten & Number Order
When we count past 9, we make a group of TEN! Number 10 is our very first two-digit number.
1 Ten (10)
+ 4 Ones = 14
Ten-Frame Model: 1 Ten and 4 Ones make 14 (Fourteen)
1. Building Numbers 10 to 20 with Tens & Ones
Every teen number is made of 1 Ten plus extra ones: 10 = 1 Ten, 11 = 1 Ten + 1 One, 12 = 1 Ten + 2 Ones, 13 = 1 Ten + 3 Ones, 14 = 1 Ten + 4 Ones, 15 = 1 Ten + 5 Ones, 16 = 1 Ten + 6 Ones, 17 = 1 Ten + 7 Ones, 18 = 1 Ten + 8 Ones, 19 = 1 Ten + 9 Ones, 20 = 2 Tens.
Ten-Frame: When the 10-frame box is full, it holds exactly 10 counters!
2. Before, After, and Between Numbers
• Before: The number immediately to the left (1 less). Before 15 is 14.
• After: The number immediately to the right (1 more). After 15 is 16.
• Between: The middle number. 15 is between 14 and 16.
Practice: What comes between 17 and 19? The answer is 18!
💡 Key Learning Takeaways
- 10 ones bundle together to make 1 Ten.
- Numbers 11 to 20 consist of 1 Ten and some Ones.
- 'Before' means 1 less; 'After' means 1 more; 'Between' is the middle number.
🎯 Key Learning Takeaways
Understand teen numbers, 10-frame model, and before/after/between.
📄 Printable Worksheets (10 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
WL-G1-C04-W10
A4 • 15 Qs
Numbers 10–20 — Worksheet 10
Curriculum Excellence & Final Review
WL-G1-C04-W09
A4 • 15 Qs
Numbers 10–20 — Worksheet 9
Mastery Assessment & Progress Check
WL-G1-C04-W08
A4 • 15 Qs
Numbers 10–20 — Worksheet 8
Mixed Review & Reinforcement
WL-G1-C04-W07
A4 • 15 Qs
Numbers 10–20 — Worksheet 7
Everyday Applications & Story Maths
WL-G1-C04-W06
A4 • 15 Qs
Numbers 10–20 — Worksheet 6
Critical Thinking & Deep Understanding
WL-G1-C04-W05
A4 • 15 Qs
Numbers 10–20 — Worksheet 5
Speed Challenge & Quick Check
WL-G1-C04-W04
A4 • 15 Qs
Numbers 10–20 — Worksheet 4
Problem Solving & Real-Life Stories
WL-G1-C04-W03
A4 • 15 Qs
Numbers 10–20 — Worksheet 3
Hands-on Visual Activity & Matching
WL-G1-C04-W02
A4 • 15 Qs
Numbers 10–20 — Worksheet 2
Essential Practice & Skill Builder
WL-G1-C04-W01
A4 • 15 Qs
Numbers 10–20 — 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
Farmer Dan has 6 sheep. Farmer Ben has 4 sheep. How many sheep must Dan give to Ben so they have different counts by 1?
A
1 sheep
B
All of them
C
Calculate difference
D
None
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
1 sheep
Step-by-Step Explanation:
Adjusting by 1 changes the relative difference by 2.
2
Multiple Choice
Hard
1 Mark
I am a mystery number. If you add 4 to me, you get 10. Then if you subtract 2, what do you get?
A
4
B
8
C
6
D
4
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
4
Step-by-Step Explanation:
The mystery number is 6. Subtracting 2 gives 4.
3
Multiple Choice
Hard
1 Mark
If 6 + 4 = 10, what is 4 + 6?
A
4
B
10
C
6
D
11
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10
Step-by-Step Explanation:
Addition is commutative: changing the order of addends does not change the sum.
4
Multiple Choice
Hard
1 Mark
Why is 10 greater than 6?
A
Because subtraction makes numbers bigger
B
Because it ends with an odd digit
C
Because order doesn't matter
D
Because adding 4 positive items increases the total amount
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because adding 4 positive items increases the total amount
Step-by-Step Explanation:
Adding any non-zero positive number produces a larger total.
5
Multiple Choice
Medium
1 Mark
Sam claims: 'Taking away 4 from 10 gives 14.' What did Sam do wrong?
A
He counted backward
B
He added instead of subtracting
C
He divided the numbers
D
He forgot the tens
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
Taking away means subtraction, but Sam performed addition.
6
Multiple Choice
Medium
1 Mark
A student said that 6 + 4 equals 20 because 'we always put 1 in front'. What mistake did the student make?
A
The addition is correct
B
They subtracted instead
C
They confused adding numbers with writing digits side by side
D
They forgot the decimal
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
They confused adding numbers with writing digits side by side
Step-by-Step Explanation:
Place values must be added together, not concatenated blindly.
7
Multiple Choice
Medium
1 Mark
What number completes the pattern: 6, 8, 10, [ ? ]?
A
14
B
12
C
13
D
11
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
12
Step-by-Step Explanation:
The pattern adds 2 each time. 10 + 2 = 12.
8
Multiple Choice
Medium
1 Mark
Find the missing number: 6 + [ ? ] = 10.
A
6
B
5
C
3
D
4
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
4
Step-by-Step Explanation:
Missing number is 4 because 6 + 4 = 10.
9
Multiple Choice
Medium
1 Mark
In a garden, there are 6 red butterflies and 4 blue butterflies. How many butterflies are fluttering together?
A
4 butterflies
B
13 butterflies
C
10 butterflies
D
6 butterflies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10 butterflies
Step-by-Step Explanation:
6 + 4 = 10 butterflies.
10
Multiple Choice
Medium
1 Mark
A school library table had 10 storybooks. Students checked out 4 books. How many books remain on the table?
A
5 books
B
4 books
C
6 books
D
7 books
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
6 books
Step-by-Step Explanation:
(10) - 4 = 6 books remain.
11
Multiple Choice
Medium
1 Mark
A baker made 6 blueberry muffins in the morning and 4 chocolate muffins in the afternoon. How many muffins did he bake in all?
A
6 muffins
B
9 muffins
C
12 muffins
D
10 muffins
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10 muffins
Step-by-Step Explanation:
6 + 4 = 10 muffins baked.
12
Multiple Choice
Easy
1 Mark
What is the result of taking away 4 from 10?
A
6
B
5
C
4
D
7
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
6
Step-by-Step Explanation:
(10) - 4 = 6.
13
Multiple Choice
Easy
1 Mark
Compare the quantities: 11 [ ? ] 8.
A
≈
B
<
C
>
D
=
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
11 is greater than 8.
14
Multiple Choice
Easy
1 Mark
Which number is 1 more than 10?
A
10
B
11
C
9
D
12
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
11
Step-by-Step Explanation:
Adding 1 gives 11.
15
Multiple Choice
Easy
1 Mark
In Chapter 'Numbers 10–20', what is 6 + 4?
A
12
B
11
C
10
D
9
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10
Step-by-Step Explanation:
6 + 4 = 10.
16
Multiple Choice
Hard
1 Mark
Farmer Dan has 5 sheep. Farmer Ben has 9 sheep. How many sheep must Dan give to Ben so they have different counts by 1?
A
None
B
Calculate difference
C
All of them
D
1 sheep
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
1 sheep
Step-by-Step Explanation:
Adjusting by 1 changes the relative difference by 2.
17
Multiple Choice
Hard
1 Mark
I am a mystery number. If you add 9 to me, you get 14. Then if you subtract 2, what do you get?
A
9
B
7
C
3
D
5
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3
Step-by-Step Explanation:
The mystery number is 5. Subtracting 2 gives 3.
18
Multiple Choice
Hard
1 Mark
If 5 + 9 = 14, what is 9 + 5?
A
15
B
14
C
9
D
5
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
14
Step-by-Step Explanation:
Addition is commutative: changing the order of addends does not change the sum.
19
Multiple Choice
Hard
1 Mark
Why is 14 greater than 5?
A
Because adding 9 positive items increases the total amount
B
Because order doesn't matter
C
Because subtraction makes numbers bigger
D
Because it ends with an odd digit
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because adding 9 positive items increases the total amount
Step-by-Step Explanation:
Adding any non-zero positive number produces a larger total.
20
Multiple Choice
Medium
1 Mark
Sam claims: 'Taking away 9 from 14 gives 23.' What did Sam do wrong?
A
He forgot the tens
B
He added instead of subtracting
C
He divided the numbers
D
He counted backward
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
Taking away means subtraction, but Sam performed addition.
21
Multiple Choice
Medium
1 Mark
A student said that 5 + 9 equals 24 because 'we always put 1 in front'. What mistake did the student make?
A
They forgot the decimal
B
They subtracted instead
C
They confused adding numbers with writing digits side by side
D
The addition is correct
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
They confused adding numbers with writing digits side by side
Step-by-Step Explanation:
Place values must be added together, not concatenated blindly.
22
Multiple Choice
Medium
1 Mark
What number completes the pattern: 5, 7, 9, [ ? ]?
A
13
B
11
C
10
D
12
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
11
Step-by-Step Explanation:
The pattern adds 2 each time. 9 + 2 = 11.
23
Multiple Choice
Medium
1 Mark
Find the missing number: 5 + [ ? ] = 14.
A
5
B
10
C
8
D
9
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
9
Step-by-Step Explanation:
Missing number is 9 because 5 + 9 = 14.
24
Multiple Choice
Medium
1 Mark
In a garden, there are 5 red butterflies and 9 blue butterflies. How many butterflies are fluttering together?
A
9 butterflies
B
14 butterflies
C
5 butterflies
D
17 butterflies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
14 butterflies
Step-by-Step Explanation:
5 + 9 = 14 butterflies.
25
Multiple Choice
Medium
1 Mark
A school library table had 14 storybooks. Students checked out 9 books. How many books remain on the table?
A
4 books
B
9 books
C
5 books
D
6 books
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
5 books
Step-by-Step Explanation:
(14) - 9 = 5 books remain.
26
Multiple Choice
Medium
1 Mark
A baker made 5 blueberry muffins in the morning and 9 chocolate muffins in the afternoon. How many muffins did he bake in all?
A
13 muffins
B
14 muffins
C
5 muffins
D
16 muffins
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
14 muffins
Step-by-Step Explanation:
5 + 9 = 14 muffins baked.
27
Multiple Choice
Easy
1 Mark
What is the result of taking away 9 from 14?
A
5
B
6
C
4
D
9
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
5
Step-by-Step Explanation:
(14) - 9 = 5.
28
Multiple Choice
Easy
1 Mark
Compare the quantities: 10 [ ? ] 7.
A
<
B
=
C
>
D
≈
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
10 is greater than 7.
29
Multiple Choice
Easy
1 Mark
Which number is 1 more than 14?
A
13
B
14
C
15
D
16
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
15
Step-by-Step Explanation:
Adding 1 gives 15.
30
Multiple Choice
Easy
1 Mark
In Chapter 'Numbers 10–20', what is 5 + 9?
A
15
B
14
C
16
D
13
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
14
Step-by-Step Explanation:
5 + 9 = 14.
31
Multiple Choice
Hard
1 Mark
Farmer Dan has 4 sheep. Farmer Ben has 6 sheep. How many sheep must Dan give to Ben so they have different counts by 1?
A
Calculate difference
B
None
C
All of them
D
1 sheep
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
1 sheep
Step-by-Step Explanation:
Adjusting by 1 changes the relative difference by 2.
32
Multiple Choice
Hard
1 Mark
I am a mystery number. If you add 6 to me, you get 10. Then if you subtract 2, what do you get?
A
6
B
6
C
2
D
4
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
2
Step-by-Step Explanation:
The mystery number is 4. Subtracting 2 gives 2.
33
Multiple Choice
Hard
1 Mark
If 4 + 6 = 10, what is 6 + 4?
A
10
B
4
C
6
D
11
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10
Step-by-Step Explanation:
Addition is commutative: changing the order of addends does not change the sum.
34
Multiple Choice
Hard
1 Mark
Why is 10 greater than 4?
A
Because adding 6 positive items increases the total amount
B
Because subtraction makes numbers bigger
C
Because it ends with an odd digit
D
Because order doesn't matter
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because adding 6 positive items increases the total amount
Step-by-Step Explanation:
Adding any non-zero positive number produces a larger total.
35
Multiple Choice
Medium
1 Mark
Sam claims: 'Taking away 6 from 10 gives 16.' What did Sam do wrong?
A
He forgot the tens
B
He divided the numbers
C
He counted backward
D
He added instead of subtracting
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
Taking away means subtraction, but Sam performed addition.
36
Multiple Choice
Medium
1 Mark
A student said that 4 + 6 equals 20 because 'we always put 1 in front'. What mistake did the student make?
A
They forgot the decimal
B
The addition is correct
C
They confused adding numbers with writing digits side by side
D
They subtracted instead
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
They confused adding numbers with writing digits side by side
Step-by-Step Explanation:
Place values must be added together, not concatenated blindly.
37
Multiple Choice
Medium
1 Mark
What number completes the pattern: 4, 6, 8, [ ? ]?
A
10
B
9
C
11
D
12
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10
Step-by-Step Explanation:
The pattern adds 2 each time. 8 + 2 = 10.
38
Multiple Choice
Medium
1 Mark
Find the missing number: 4 + [ ? ] = 10.
A
6
B
5
C
4
D
7
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
6
Step-by-Step Explanation:
Missing number is 6 because 4 + 6 = 10.
39
Multiple Choice
Medium
1 Mark
In a garden, there are 4 red butterflies and 6 blue butterflies. How many butterflies are fluttering together?
A
10 butterflies
B
13 butterflies
C
6 butterflies
D
4 butterflies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10 butterflies
Step-by-Step Explanation:
4 + 6 = 10 butterflies.
40
Multiple Choice
Medium
1 Mark
A school library table had 10 storybooks. Students checked out 6 books. How many books remain on the table?
A
5 books
B
3 books
C
6 books
D
4 books
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
4 books
Step-by-Step Explanation:
(10) - 6 = 4 books remain.
41
Multiple Choice
Medium
1 Mark
A baker made 4 blueberry muffins in the morning and 6 chocolate muffins in the afternoon. How many muffins did he bake in all?
A
10 muffins
B
9 muffins
C
4 muffins
D
12 muffins
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10 muffins
Step-by-Step Explanation:
4 + 6 = 10 muffins baked.
42
Multiple Choice
Easy
1 Mark
What is the result of taking away 6 from 10?
A
5
B
4
C
6
D
3
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
4
Step-by-Step Explanation:
(10) - 6 = 4.
43
Multiple Choice
Easy
1 Mark
Compare the quantities: 9 [ ? ] 6.
A
=
B
≈
C
>
D
<
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
9 is greater than 6.
44
Multiple Choice
Easy
1 Mark
Which number is 1 more than 10?
A
10
B
11
C
9
D
12
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
11
Step-by-Step Explanation:
Adding 1 gives 11.
45
Multiple Choice
Easy
1 Mark
In Chapter 'Numbers 10–20', what is 4 + 6?
A
12
B
9
C
11
D
10
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10
Step-by-Step Explanation:
4 + 6 = 10.
46
Multiple Choice
Hard
1 Mark
Farmer Dan has 3 sheep. Farmer Ben has 3 sheep. How many sheep must Dan give to Ben so they have different counts by 1?
A
All of them
B
1 sheep
C
Calculate difference
D
None
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
1 sheep
Step-by-Step Explanation:
Adjusting by 1 changes the relative difference by 2.
47
Multiple Choice
Hard
1 Mark
I am a mystery number. If you add 3 to me, you get 6. Then if you subtract 2, what do you get?
A
3
B
5
C
1
D
3
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
1
Step-by-Step Explanation:
The mystery number is 3. Subtracting 2 gives 1.
48
Multiple Choice
Hard
1 Mark
If 3 + 3 = 6, what is 3 + 3?
A
6
B
7
C
3
D
3
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
6
Step-by-Step Explanation:
Addition is commutative: changing the order of addends does not change the sum.
49
Multiple Choice
Hard
1 Mark
Why is 6 greater than 3?
A
Because it ends with an odd digit
B
Because adding 3 positive items increases the total amount
C
Because order doesn't matter
D
Because subtraction makes numbers bigger
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because adding 3 positive items increases the total amount
Step-by-Step Explanation:
Adding any non-zero positive number produces a larger total.
50
Multiple Choice
Medium
1 Mark
Sam claims: 'Taking away 3 from 6 gives 9.' What did Sam do wrong?
A
He divided the numbers
B
He forgot the tens
C
He added instead of subtracting
D
He counted backward
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
Taking away means subtraction, but Sam performed addition.