Lesson 13.2: Measuring Length Using Non-Standard Units
Hands-on measurement with handspans, paces, and paper clips.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
#NonStandardUnits #MeasuringLength #HandspanFootsteps
Measuring Length Using Non-Standard Units
Before modern rulers were invented, ancient humans used parts of their bodies and everyday items to measure lengths!
Pencil (Longer)
Eraser (Shorter)
Measured using
Paper Clips
Measurement of Length: Comparing long and short objects using units.
1. Body Units (Non-Standard)
• Handspan: Distance from the tip of the thumb to the tip of the little finger when stretched wide.
• Cubit: Distance from the elbow to the tip of the middle finger.
• Footstep / Pace: Length of one walking step (great for measuring a room or playground).
Why are they non-standard? Because an adult's handspan is bigger than a child's handspan! So the count will be different.
2. Object Units (Paper Clips & Blocks)
We can also measure using small, identical objects: 'This new pencil is 6 paper clips long' or 'The notebook is 8 eraser lengths wide'.
Accuracy Tip: Place units end-to-end without leaving gaps or overlapping!
💡 Key Learning Takeaways
- Non-standard units include handspans, paces, paper clips, and blocks.
- Do not leave gaps or overlap units when measuring.
- Different people have different handspan sizes.
🎯 Key Learning Takeaways
Non-standard units of length.
📄 Printable Worksheets (10 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
WL-G2-C13-W10
A4 • 15 Qs
Measurement of Length — Worksheet 10
Curriculum Excellence & Final Review
WL-G2-C13-W09
A4 • 15 Qs
Measurement of Length — Worksheet 9
Mastery Assessment & Progress Check
WL-G2-C13-W08
A4 • 15 Qs
Measurement of Length — Worksheet 8
Mixed Review & Reinforcement
WL-G2-C13-W07
A4 • 15 Qs
Measurement of Length — Worksheet 7
Everyday Applications & Story Maths
WL-G2-C13-W06
A4 • 15 Qs
Measurement of Length — Worksheet 6
Critical Thinking & Deep Understanding
WL-G2-C13-W05
A4 • 15 Qs
Measurement of Length — Worksheet 5
Speed Challenge & Quick Check
WL-G2-C13-W04
A4 • 15 Qs
Measurement of Length — Worksheet 4
Problem Solving & Real-Life Stories
WL-G2-C13-W03
A4 • 15 Qs
Measurement of Length — Worksheet 3
Hands-on Visual Activity & Matching
WL-G2-C13-W02
A4 • 15 Qs
Measurement of Length — Worksheet 2
Essential Practice & Skill Builder
WL-G2-C13-W01
A4 • 15 Qs
Measurement of Length — 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 (51 + 10) and (19 + 10)?
A
32
B
19
C
51
D
42
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
32
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (51 + 10) - (19 + 10) = 51 - 19 = 32.
2
Multiple Choice
Hard
1 Mark
A secret number plus 32 equals 51. If you double the secret number, what is the result?
A
102
B
19
C
38
D
21
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
38
Step-by-Step Explanation:
The secret number is 19. Doubling it gives 19 × 2 = 38.
3
Multiple Choice
Hard
1 Mark
If 19 + 32 = 51, what is 32 + 19?
A
32
B
52
C
51
D
19
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
51
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
4
Multiple Choice
Hard
1 Mark
Why is 51 greater than 19?
A
Because {tot} has a bigger first digit
B
Numbers ending in 0 are always smaller
C
Because {v1} is an even number
D
Because 51 includes 19 plus an additional 32 items
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 51 includes 19 plus an additional 32 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
5
Multiple Choice
Medium
1 Mark
Sam evaluated 51 - 32 and wrote 83. 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.
6
Multiple Choice
Medium
1 Mark
A student claimed that 19 + 32 = 61 because 'we must add 10 to every answer'. Why is this student wrong?
A
The student subtracted instead
B
The answer is 0
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:
19 + 32 equals exactly 51.
7
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.
8
Multiple Choice
Medium
1 Mark
Find the missing number: 19 + [ ? ] = 51.
A
33
B
31
C
32
D
19
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
32
Step-by-Step Explanation:
Missing value is 32 because 19 + 32 = 51.
9
Multiple Choice
Medium
1 Mark
In a school garden, there are 19 yellow marigolds and 32 purple petunias. How many flowers are blooming in total?
A
51 flowers
B
32 flowers
C
56 flowers
D
19 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
51 flowers
Step-by-Step Explanation:
19 + 32 = 51 flowers.
10
Multiple Choice
Medium
1 Mark
A school library received 51 new graphic novels. Students checked out 32 novels on Monday. How many new novels are still on the shelf?
A
19 novels
B
51 novels
C
32 novels
D
20 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
19 novels
Step-by-Step Explanation:
51 - 32 = 19 novels remaining.
11
Multiple Choice
Medium
1 Mark
A baker packed 19 apple pies in the morning and 32 cherry pies in the afternoon. How many pies did the baker pack in all?
A
49 pies
B
53 pies
C
19 pies
D
51 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
51 pies
Step-by-Step Explanation:
19 + 32 = 51 pies in total.
12
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.
13
Multiple Choice
Easy
1 Mark
Which comparison is correct: 51 [ ? ] 46?
A
<
B
=
C
≈
D
>
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
51 is greater than 46.
14
Multiple Choice
Easy
1 Mark
Calculate: 51 - 32 = ?
A
18
B
32
C
20
D
19
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
19
Step-by-Step Explanation:
51 - 32 = 19.
15
Multiple Choice
Easy
1 Mark
In Chapter 'Measurement of Length', calculate: 19 + 32 = ?
A
50
B
51
C
61
D
52
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
51
Step-by-Step Explanation:
19 + 32 = 51.
16
Multiple Choice
Hard
1 Mark
What is the difference between (76 + 10) and (47 + 10)?
A
39
B
47
C
76
D
29
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
29
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (76 + 10) - (47 + 10) = 76 - 47 = 29.
17
Multiple Choice
Hard
1 Mark
A secret number plus 29 equals 76. If you double the secret number, what is the result?
A
47
B
152
C
49
D
94
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
94
Step-by-Step Explanation:
The secret number is 47. Doubling it gives 47 × 2 = 94.
18
Multiple Choice
Hard
1 Mark
If 47 + 29 = 76, what is 29 + 47?
A
47
B
29
C
76
D
77
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
76
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
19
Multiple Choice
Hard
1 Mark
Why is 76 greater than 47?
A
Because {v1} is an even number
B
Because 76 includes 47 plus an additional 29 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 76 includes 47 plus an additional 29 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
20
Multiple Choice
Medium
1 Mark
Sam evaluated 76 - 29 and wrote 105. What was Sam's mistake?
A
He forgot the units place
B
He divided the numbers
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.
21
Multiple Choice
Medium
1 Mark
A student claimed that 47 + 29 = 86 because 'we must add 10 to every answer'. Why is this student wrong?
A
Addition is only for 1-digit numbers
B
The answer is 0
C
The student subtracted instead
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:
47 + 29 equals exactly 76.
22
Multiple Choice
Medium
1 Mark
Complete the pattern: 47, 52, 57, [ ? ].
A
67
B
62
C
61
D
59
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
62
Step-by-Step Explanation:
The pattern increases by 5. 57 + 5 = 62.
23
Multiple Choice
Medium
1 Mark
Find the missing number: 47 + [ ? ] = 76.
A
47
B
28
C
30
D
29
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
29
Step-by-Step Explanation:
Missing value is 29 because 47 + 29 = 76.
24
Multiple Choice
Medium
1 Mark
In a school garden, there are 47 yellow marigolds and 29 purple petunias. How many flowers are blooming in total?
A
81 flowers
B
47 flowers
C
29 flowers
D
76 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
76 flowers
Step-by-Step Explanation:
47 + 29 = 76 flowers.
25
Multiple Choice
Medium
1 Mark
A school library received 76 new graphic novels. Students checked out 29 novels on Monday. How many new novels are still on the shelf?
A
48 novels
B
29 novels
C
76 novels
D
47 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
47 novels
Step-by-Step Explanation:
76 - 29 = 47 novels remaining.
26
Multiple Choice
Medium
1 Mark
A baker packed 47 apple pies in the morning and 29 cherry pies in the afternoon. How many pies did the baker pack in all?
A
78 pies
B
76 pies
C
74 pies
D
47 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
76 pies
Step-by-Step Explanation:
47 + 29 = 76 pies in total.
27
Multiple Choice
Easy
1 Mark
What number is 10 more than 47?
A
37
B
48
C
67
D
57
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
57
Step-by-Step Explanation:
47 + 10 = 57.
28
Multiple Choice
Easy
1 Mark
Which comparison is correct: 76 [ ? ] 71?
A
<
B
=
C
≈
D
>
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
76 is greater than 71.
29
Multiple Choice
Easy
1 Mark
Calculate: 76 - 29 = ?
A
29
B
48
C
47
D
46
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
47
Step-by-Step Explanation:
76 - 29 = 47.
30
Multiple Choice
Easy
1 Mark
In Chapter 'Measurement of Length', calculate: 47 + 29 = ?
A
86
B
75
C
77
D
76
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
76
Step-by-Step Explanation:
47 + 29 = 76.
31
Multiple Choice
Hard
1 Mark
What is the difference between (66 + 10) and (40 + 10)?
A
66
B
40
C
26
D
36
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
26
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (66 + 10) - (40 + 10) = 66 - 40 = 26.
32
Multiple Choice
Hard
1 Mark
A secret number plus 26 equals 66. If you double the secret number, what is the result?
A
132
B
42
C
80
D
40
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
80
Step-by-Step Explanation:
The secret number is 40. Doubling it gives 40 × 2 = 80.
33
Multiple Choice
Hard
1 Mark
If 40 + 26 = 66, what is 26 + 40?
A
67
B
40
C
66
D
26
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
66
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
34
Multiple Choice
Hard
1 Mark
Why is 66 greater than 40?
A
Because 66 includes 40 plus an additional 26 items
B
Numbers ending in 0 are always smaller
C
Because {tot} has a bigger first digit
D
Because {v1} is an even number
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 66 includes 40 plus an additional 26 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
35
Multiple Choice
Medium
1 Mark
Sam evaluated 66 - 26 and wrote 92. What was Sam's mistake?
A
He multiplied by 2
B
He forgot the units place
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.
36
Multiple Choice
Medium
1 Mark
A student claimed that 40 + 26 = 76 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
Addition is only for 1-digit numbers
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:
40 + 26 equals exactly 66.
37
Multiple Choice
Medium
1 Mark
Complete the pattern: 40, 45, 50, [ ? ].
A
52
B
54
C
60
D
55
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
55
Step-by-Step Explanation:
The pattern increases by 5. 50 + 5 = 55.
38
Multiple Choice
Medium
1 Mark
Find the missing number: 40 + [ ? ] = 66.
A
25
B
27
C
26
D
40
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
26
Step-by-Step Explanation:
Missing value is 26 because 40 + 26 = 66.
39
Multiple Choice
Medium
1 Mark
In a school garden, there are 40 yellow marigolds and 26 purple petunias. How many flowers are blooming in total?
A
40 flowers
B
66 flowers
C
26 flowers
D
71 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
66 flowers
Step-by-Step Explanation:
40 + 26 = 66 flowers.
40
Multiple Choice
Medium
1 Mark
A school library received 66 new graphic novels. Students checked out 26 novels on Monday. How many new novels are still on the shelf?
A
26 novels
B
41 novels
C
40 novels
D
66 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40 novels
Step-by-Step Explanation:
66 - 26 = 40 novels remaining.
41
Multiple Choice
Medium
1 Mark
A baker packed 40 apple pies in the morning and 26 cherry pies in the afternoon. How many pies did the baker pack in all?
A
66 pies
B
68 pies
C
64 pies
D
40 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
66 pies
Step-by-Step Explanation:
40 + 26 = 66 pies in total.
42
Multiple Choice
Easy
1 Mark
What number is 10 more than 40?
A
60
B
30
C
41
D
50
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
50
Step-by-Step Explanation:
40 + 10 = 50.
43
Multiple Choice
Easy
1 Mark
Which comparison is correct: 66 [ ? ] 61?
A
>
B
<
C
=
D
≈
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
66 is greater than 61.
44
Multiple Choice
Easy
1 Mark
Calculate: 66 - 26 = ?
A
26
B
41
C
39
D
40
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40
Step-by-Step Explanation:
66 - 26 = 40.
45
Multiple Choice
Easy
1 Mark
In Chapter 'Measurement of Length', calculate: 40 + 26 = ?
A
66
B
76
C
67
D
65
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
66
Step-by-Step Explanation:
40 + 26 = 66.
46
Multiple Choice
Hard
1 Mark
What is the difference between (56 + 10) and (33 + 10)?
A
56
B
23
C
33
D
33
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
23
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (56 + 10) - (33 + 10) = 56 - 33 = 23.
47
Multiple Choice
Hard
1 Mark
A secret number plus 23 equals 56. If you double the secret number, what is the result?
A
112
B
66
C
35
D
33
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
66
Step-by-Step Explanation:
The secret number is 33. Doubling it gives 33 × 2 = 66.
48
Multiple Choice
Hard
1 Mark
If 33 + 23 = 56, what is 23 + 33?
A
57
B
33
C
23
D
56
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
56
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
49
Multiple Choice
Hard
1 Mark
Why is 56 greater than 33?
A
Because {tot} has a bigger first digit
B
Because 56 includes 33 plus an additional 23 items
C
Numbers ending in 0 are always smaller
D
Because {v1} is an even number
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 56 includes 33 plus an additional 23 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
50
Multiple Choice
Medium
1 Mark
Sam evaluated 56 - 23 and wrote 79. What was Sam's mistake?
A
He multiplied by 2
B
He added instead of subtracting
C
He divided the numbers
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.