Lesson 6.2: Number-Line Subtraction, Mental Subtraction, and Word Problems
Counting back on number lines and story sums.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
#NumberLineSubtraction #MentalSubtraction #WordProblems
Number-Line Subtraction, Mental Subtraction & Word Problems
Counting backward along a number line makes subtracting fast and visual.
56
- 20 (Count back 2 tens)
36
- 4
32
Subtraction on a Number Line: 56 - 24 = 32.
1. Jumping Back on the Number Line
To calculate 56 - 24: start at 56 on the number line. Jump backward 2 tens (20 steps) to land on 36. Then jump backward 4 ones to land on 32!
Mental Math: 65 - 30 = 35 (only the tens digit changes!).
2. Subtraction Clue Words
Look for words like 'left', 'remaining', 'gave away', 'how many more', 'difference', and 'fell down'. These tell you to SUBTRACT!
Story Sum: A fruit basket had 35 apples. 12 were eaten. How many are left? 35 - 12 = 23 apples!
💡 Key Learning Takeaways
- Jump backward on the number line to subtract.
- Clue words: left, remaining, difference, gave away.
- Subtracting tens only changes the tens digit.
🎯 Key Learning Takeaways
Subtraction word problems.
📄 Printable Worksheets (10 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
WL-G2-C06-W10
A4 • 15 Qs
Subtraction — Worksheet 10
Curriculum Excellence & Final Review
WL-G2-C06-W09
A4 • 15 Qs
Subtraction — Worksheet 9
Mastery Assessment & Progress Check
WL-G2-C06-W08
A4 • 15 Qs
Subtraction — Worksheet 8
Mixed Review & Reinforcement
WL-G2-C06-W07
A4 • 15 Qs
Subtraction — Worksheet 7
Everyday Applications & Story Maths
WL-G2-C06-W06
A4 • 15 Qs
Subtraction — Worksheet 6
Critical Thinking & Deep Understanding
WL-G2-C06-W05
A4 • 15 Qs
Subtraction — Worksheet 5
Speed Challenge & Quick Check
WL-G2-C06-W04
A4 • 15 Qs
Subtraction — Worksheet 4
Problem Solving & Real-Life Stories
WL-G2-C06-W03
A4 • 15 Qs
Subtraction — Worksheet 3
Hands-on Visual Activity & Matching
WL-G2-C06-W02
A4 • 15 Qs
Subtraction — Worksheet 2
Essential Practice & Skill Builder
WL-G2-C06-W01
A4 • 15 Qs
Subtraction — 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 (55 + 10) and (33 + 10)?
A
22
B
55
C
32
D
33
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
22
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (55 + 10) - (33 + 10) = 55 - 33 = 22.
2
Multiple Choice
Hard
1 Mark
A secret number plus 22 equals 55. If you double the secret number, what is the result?
A
35
B
66
C
33
D
110
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
66
Step-by-Step Explanation:
The secret number is 33. Doubling it gives 33 × 2 = 66.
3
Multiple Choice
Hard
1 Mark
If 33 + 22 = 55, what is 22 + 33?
A
22
B
33
C
56
D
55
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
55
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
4
Multiple Choice
Hard
1 Mark
Why is 55 greater than 33?
A
Because {v1} is an even number
B
Because 55 includes 33 plus an additional 22 items
C
Because {tot} has a bigger first digit
D
Numbers ending in 0 are always smaller
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 55 includes 33 plus an additional 22 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
5
Multiple Choice
Medium
1 Mark
Sam evaluated 55 - 22 and wrote 77. What was Sam's mistake?
A
He forgot the units place
B
He divided the numbers
C
He added instead of subtracting
D
He multiplied by 2
💡 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 33 + 22 = 65 because 'we must add 10 to every answer'. Why is this student wrong?
A
The answer is 0
B
The student subtracted instead
C
Addition is only for 1-digit numbers
D
Addition means combining only the given numbers without adding extra amounts
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
33 + 22 equals exactly 55.
7
Multiple Choice
Medium
1 Mark
Complete the pattern: 33, 38, 43, [ ? ].
A
48
B
53
C
47
D
45
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
48
Step-by-Step Explanation:
The pattern increases by 5. 43 + 5 = 48.
8
Multiple Choice
Medium
1 Mark
Find the missing number: 33 + [ ? ] = 55.
A
21
B
22
C
23
D
33
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
22
Step-by-Step Explanation:
Missing value is 22 because 33 + 22 = 55.
9
Multiple Choice
Medium
1 Mark
In a school garden, there are 33 yellow marigolds and 22 purple petunias. How many flowers are blooming in total?
A
60 flowers
B
22 flowers
C
33 flowers
D
55 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
55 flowers
Step-by-Step Explanation:
33 + 22 = 55 flowers.
10
Multiple Choice
Medium
1 Mark
A school library received 55 new graphic novels. Students checked out 22 novels on Monday. How many new novels are still on the shelf?
A
55 novels
B
33 novels
C
22 novels
D
34 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
33 novels
Step-by-Step Explanation:
55 - 22 = 33 novels remaining.
11
Multiple Choice
Medium
1 Mark
A baker packed 33 apple pies in the morning and 22 cherry pies in the afternoon. How many pies did the baker pack in all?
A
33 pies
B
55 pies
C
53 pies
D
57 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
55 pies
Step-by-Step Explanation:
33 + 22 = 55 pies in total.
12
Multiple Choice
Easy
1 Mark
What number is 10 more than 33?
A
23
B
43
C
53
D
34
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
43
Step-by-Step Explanation:
33 + 10 = 43.
13
Multiple Choice
Easy
1 Mark
Which comparison is correct: 55 [ ? ] 50?
A
<
B
=
C
≈
D
>
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
55 is greater than 50.
14
Multiple Choice
Easy
1 Mark
Calculate: 55 - 22 = ?
A
33
B
34
C
32
D
22
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
33
Step-by-Step Explanation:
55 - 22 = 33.
15
Multiple Choice
Easy
1 Mark
In Chapter 'Subtraction', calculate: 33 + 22 = ?
A
54
B
65
C
55
D
56
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
55
Step-by-Step Explanation:
33 + 22 = 55.
16
Multiple Choice
Hard
1 Mark
What is the difference between (45 + 10) and (26 + 10)?
A
29
B
26
C
19
D
45
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
19
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (45 + 10) - (26 + 10) = 45 - 26 = 19.
17
Multiple Choice
Hard
1 Mark
A secret number plus 19 equals 45. If you double the secret number, what is the result?
A
26
B
90
C
28
D
52
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52
Step-by-Step Explanation:
The secret number is 26. Doubling it gives 26 × 2 = 52.
18
Multiple Choice
Hard
1 Mark
If 26 + 19 = 45, what is 19 + 26?
A
46
B
19
C
26
D
45
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
19
Multiple Choice
Hard
1 Mark
Why is 45 greater than 26?
A
Because 45 includes 26 plus an additional 19 items
B
Because {v1} is an even number
C
Because {tot} has a bigger first digit
D
Numbers ending in 0 are always smaller
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 45 includes 26 plus an additional 19 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
20
Multiple Choice
Medium
1 Mark
Sam evaluated 45 - 19 and wrote 64. What was Sam's mistake?
A
He forgot the units place
B
He multiplied by 2
C
He divided the numbers
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.
21
Multiple Choice
Medium
1 Mark
A student claimed that 26 + 19 = 55 because 'we must add 10 to every answer'. Why is this student wrong?
A
The student subtracted instead
B
Addition means combining only the given numbers without adding extra amounts
C
The answer is 0
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:
26 + 19 equals exactly 45.
22
Multiple Choice
Medium
1 Mark
Complete the pattern: 26, 31, 36, [ ? ].
A
41
B
40
C
38
D
46
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
41
Step-by-Step Explanation:
The pattern increases by 5. 36 + 5 = 41.
23
Multiple Choice
Medium
1 Mark
Find the missing number: 26 + [ ? ] = 45.
A
20
B
19
C
18
D
26
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
19
Step-by-Step Explanation:
Missing value is 19 because 26 + 19 = 45.
24
Multiple Choice
Medium
1 Mark
In a school garden, there are 26 yellow marigolds and 19 purple petunias. How many flowers are blooming in total?
A
26 flowers
B
45 flowers
C
50 flowers
D
19 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45 flowers
Step-by-Step Explanation:
26 + 19 = 45 flowers.
25
Multiple Choice
Medium
1 Mark
A school library received 45 new graphic novels. Students checked out 19 novels on Monday. How many new novels are still on the shelf?
A
19 novels
B
26 novels
C
27 novels
D
45 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
26 novels
Step-by-Step Explanation:
45 - 19 = 26 novels remaining.
26
Multiple Choice
Medium
1 Mark
A baker packed 26 apple pies in the morning and 19 cherry pies in the afternoon. How many pies did the baker pack in all?
A
45 pies
B
47 pies
C
43 pies
D
26 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45 pies
Step-by-Step Explanation:
26 + 19 = 45 pies in total.
27
Multiple Choice
Easy
1 Mark
What number is 10 more than 26?
A
46
B
27
C
36
D
16
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
36
Step-by-Step Explanation:
26 + 10 = 36.
28
Multiple Choice
Easy
1 Mark
Which comparison is correct: 45 [ ? ] 40?
A
>
B
≈
C
=
D
<
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
45 is greater than 40.
29
Multiple Choice
Easy
1 Mark
Calculate: 45 - 19 = ?
A
27
B
25
C
26
D
19
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
26
Step-by-Step Explanation:
45 - 19 = 26.
30
Multiple Choice
Easy
1 Mark
In Chapter 'Subtraction', calculate: 26 + 19 = ?
A
46
B
45
C
44
D
55
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45
Step-by-Step Explanation:
26 + 19 = 45.
31
Multiple Choice
Hard
1 Mark
What is the difference between (35 + 10) and (19 + 10)?
A
19
B
35
C
26
D
16
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
16
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (35 + 10) - (19 + 10) = 35 - 19 = 16.
32
Multiple Choice
Hard
1 Mark
A secret number plus 16 equals 35. If you double the secret number, what is the result?
A
70
B
21
C
38
D
19
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
38
Step-by-Step Explanation:
The secret number is 19. Doubling it gives 19 × 2 = 38.
33
Multiple Choice
Hard
1 Mark
If 19 + 16 = 35, what is 16 + 19?
A
16
B
35
C
36
D
19
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
35
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
34
Multiple Choice
Hard
1 Mark
Why is 35 greater than 19?
A
Numbers ending in 0 are always smaller
B
Because 35 includes 19 plus an additional 16 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 35 includes 19 plus an additional 16 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
35
Multiple Choice
Medium
1 Mark
Sam evaluated 35 - 16 and wrote 51. What was Sam's mistake?
A
He multiplied by 2
B
He divided the numbers
C
He added instead of subtracting
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.
36
Multiple Choice
Medium
1 Mark
A student claimed that 19 + 16 = 45 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 answer is 0
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:
19 + 16 equals exactly 35.
37
Multiple Choice
Medium
1 Mark
Complete the pattern: 19, 24, 29, [ ? ].
A
39
B
33
C
31
D
34
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
34
Step-by-Step Explanation:
The pattern increases by 5. 29 + 5 = 34.
38
Multiple Choice
Medium
1 Mark
Find the missing number: 19 + [ ? ] = 35.
A
16
B
19
C
15
D
17
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
16
Step-by-Step Explanation:
Missing value is 16 because 19 + 16 = 35.
39
Multiple Choice
Medium
1 Mark
In a school garden, there are 19 yellow marigolds and 16 purple petunias. How many flowers are blooming in total?
A
35 flowers
B
19 flowers
C
40 flowers
D
16 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
35 flowers
Step-by-Step Explanation:
19 + 16 = 35 flowers.
40
Multiple Choice
Medium
1 Mark
A school library received 35 new graphic novels. Students checked out 16 novels on Monday. How many new novels are still on the shelf?
A
16 novels
B
35 novels
C
19 novels
D
20 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
19 novels
Step-by-Step Explanation:
35 - 16 = 19 novels remaining.
41
Multiple Choice
Medium
1 Mark
A baker packed 19 apple pies in the morning and 16 cherry pies in the afternoon. How many pies did the baker pack in all?
A
19 pies
B
33 pies
C
35 pies
D
37 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
35 pies
Step-by-Step Explanation:
19 + 16 = 35 pies in total.
42
Multiple Choice
Easy
1 Mark
What number is 10 more than 19?
A
20
B
39
C
29
D
9
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
29
Step-by-Step Explanation:
19 + 10 = 29.
43
Multiple Choice
Easy
1 Mark
Which comparison is correct: 35 [ ? ] 30?
A
=
B
<
C
≈
D
>
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
35 is greater than 30.
44
Multiple Choice
Easy
1 Mark
Calculate: 35 - 16 = ?
A
20
B
19
C
18
D
16
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
19
Step-by-Step Explanation:
35 - 16 = 19.
45
Multiple Choice
Easy
1 Mark
In Chapter 'Subtraction', calculate: 19 + 16 = ?
A
45
B
34
C
35
D
36
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
35
Step-by-Step Explanation:
19 + 16 = 35.
46
Multiple Choice
Hard
1 Mark
What is the difference between (60 + 10) and (47 + 10)?
A
47
B
23
C
13
D
60
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
13
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (60 + 10) - (47 + 10) = 60 - 47 = 13.
47
Multiple Choice
Hard
1 Mark
A secret number plus 13 equals 60. If you double the secret number, what is the result?
A
94
B
49
C
120
D
47
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
94
Step-by-Step Explanation:
The secret number is 47. Doubling it gives 47 × 2 = 94.
48
Multiple Choice
Hard
1 Mark
If 47 + 13 = 60, what is 13 + 47?
A
47
B
61
C
13
D
60
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
60
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
49
Multiple Choice
Hard
1 Mark
Why is 60 greater than 47?
A
Numbers ending in 0 are always smaller
B
Because {v1} is an even number
C
Because 60 includes 47 plus an additional 13 items
D
Because {tot} has a bigger first digit
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 60 includes 47 plus an additional 13 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
50
Multiple Choice
Medium
1 Mark
Sam evaluated 60 - 13 and wrote 73. 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.