Lesson 10.2: Objects that Roll, Slide, and Stack
Explore how surface curvature determines physical movement.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
#RollOrSlide #StackingObjects #MovementOfShapes
Objects that Roll, Slide, or Stack
Depending on whether an object has curved or flat surfaces, it can roll smoothly across the floor, slide along a surface, or stack on top of other objects.
Cube (Slides)
Sphere (Rolls)
Cylinder (Both)
Cone (Both)
3D Shapes: Cube, Sphere, Cylinder, and Cone (Rolling and Sliding).
1. Rolling vs Sliding
• Roll: Objects with round, curved surfaces roll easily (ball, orange, marble).
• Slide: Objects with flat surfaces slide along a table (pencil box, eraser, book).
• Both Roll and Slide: Objects with flat and curved surfaces can do both! A coin or bottle can roll on its round side and slide on its flat face.
Experiment: Place a ramp on the floor. Which rolls faster: an apple or a book? The apple rolls!
2. Stacking Shapes
Can you stack spheres on top of each other? No, they roll away! You can only stack objects with flat top and bottom surfaces, like cubes, cuboids, and cylinders.
Builder's Tip: That's why bricks and building blocks are shaped like cubes and cuboids!
💡 Key Learning Takeaways
- Curved surfaces roll; flat surfaces slide.
- Coins, cylinders, and cones can both roll and slide.
- Only flat-surfaced objects can be stacked securely.
🎯 Key Learning Takeaways
Rolling, sliding, and stacking.
📄 Printable Worksheets (10 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
WL-G2-C10-W10
A4 • 15 Qs
3D Shapes — Worksheet 10
Curriculum Excellence & Final Review
WL-G2-C10-W09
A4 • 15 Qs
3D Shapes — Worksheet 9
Mastery Assessment & Progress Check
WL-G2-C10-W08
A4 • 15 Qs
3D Shapes — Worksheet 8
Mixed Review & Reinforcement
WL-G2-C10-W07
A4 • 15 Qs
3D Shapes — Worksheet 7
Everyday Applications & Story Maths
WL-G2-C10-W06
A4 • 15 Qs
3D Shapes — Worksheet 6
Critical Thinking & Deep Understanding
WL-G2-C10-W05
A4 • 15 Qs
3D Shapes — Worksheet 5
Speed Challenge & Quick Check
WL-G2-C10-W04
A4 • 15 Qs
3D Shapes — Worksheet 4
Problem Solving & Real-Life Stories
WL-G2-C10-W03
A4 • 15 Qs
3D Shapes — Worksheet 3
Hands-on Visual Activity & Matching
WL-G2-C10-W02
A4 • 15 Qs
3D Shapes — Worksheet 2
Essential Practice & Skill Builder
WL-G2-C10-W01
A4 • 15 Qs
3D Shapes — 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 (62 + 10) and (45 + 10)?
A
45
B
17
C
27
D
62
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
17
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (62 + 10) - (45 + 10) = 62 - 45 = 17.
2
Multiple Choice
Hard
1 Mark
A secret number plus 17 equals 62. If you double the secret number, what is the result?
A
124
B
45
C
47
D
90
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
90
Step-by-Step Explanation:
The secret number is 45. Doubling it gives 45 × 2 = 90.
3
Multiple Choice
Hard
1 Mark
If 45 + 17 = 62, what is 17 + 45?
A
45
B
17
C
63
D
62
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
62
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
4
Multiple Choice
Hard
1 Mark
Why is 62 greater than 45?
A
Numbers ending in 0 are always smaller
B
Because 62 includes 45 plus an additional 17 items
C
Because {v1} is an even number
D
Because {tot} has a bigger first digit
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 62 includes 45 plus an additional 17 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
5
Multiple Choice
Medium
1 Mark
Sam evaluated 62 - 17 and wrote 79. What was Sam's mistake?
A
He divided the numbers
B
He added instead of subtracting
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.
6
Multiple Choice
Medium
1 Mark
A student claimed that 45 + 17 = 72 because 'we must add 10 to every answer'. Why is this student wrong?
A
Addition is only for 1-digit numbers
B
The student subtracted instead
C
The answer is 0
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:
45 + 17 equals exactly 62.
7
Multiple Choice
Medium
1 Mark
Complete the pattern: 45, 50, 55, [ ? ].
A
59
B
65
C
60
D
57
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
60
Step-by-Step Explanation:
The pattern increases by 5. 55 + 5 = 60.
8
Multiple Choice
Medium
1 Mark
Find the missing number: 45 + [ ? ] = 62.
A
16
B
17
C
18
D
45
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
17
Step-by-Step Explanation:
Missing value is 17 because 45 + 17 = 62.
9
Multiple Choice
Medium
1 Mark
In a school garden, there are 45 yellow marigolds and 17 purple petunias. How many flowers are blooming in total?
A
62 flowers
B
67 flowers
C
17 flowers
D
45 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
62 flowers
Step-by-Step Explanation:
45 + 17 = 62 flowers.
10
Multiple Choice
Medium
1 Mark
A school library received 62 new graphic novels. Students checked out 17 novels on Monday. How many new novels are still on the shelf?
A
17 novels
B
46 novels
C
45 novels
D
62 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45 novels
Step-by-Step Explanation:
62 - 17 = 45 novels remaining.
11
Multiple Choice
Medium
1 Mark
A baker packed 45 apple pies in the morning and 17 cherry pies in the afternoon. How many pies did the baker pack in all?
A
62 pies
B
45 pies
C
60 pies
D
64 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
62 pies
Step-by-Step Explanation:
45 + 17 = 62 pies in total.
12
Multiple Choice
Easy
1 Mark
What number is 10 more than 45?
A
46
B
35
C
55
D
65
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
55
Step-by-Step Explanation:
45 + 10 = 55.
13
Multiple Choice
Easy
1 Mark
Which comparison is correct: 62 [ ? ] 57?
A
>
B
≈
C
<
D
=
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
62 is greater than 57.
14
Multiple Choice
Easy
1 Mark
Calculate: 62 - 17 = ?
A
45
B
44
C
17
D
46
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45
Step-by-Step Explanation:
62 - 17 = 45.
15
Multiple Choice
Easy
1 Mark
In Chapter '3D Shapes', calculate: 45 + 17 = ?
A
72
B
63
C
61
D
62
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
62
Step-by-Step Explanation:
45 + 17 = 62.
16
Multiple Choice
Hard
1 Mark
What is the difference between (52 + 10) and (38 + 10)?
A
52
B
14
C
38
D
24
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
14
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (52 + 10) - (38 + 10) = 52 - 38 = 14.
17
Multiple Choice
Hard
1 Mark
A secret number plus 14 equals 52. If you double the secret number, what is the result?
A
76
B
104
C
40
D
38
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
76
Step-by-Step Explanation:
The secret number is 38. Doubling it gives 38 × 2 = 76.
18
Multiple Choice
Hard
1 Mark
If 38 + 14 = 52, what is 14 + 38?
A
52
B
14
C
38
D
53
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
19
Multiple Choice
Hard
1 Mark
Why is 52 greater than 38?
A
Because {v1} is an even number
B
Numbers ending in 0 are always smaller
C
Because 52 includes 38 plus an additional 14 items
D
Because {tot} has a bigger first digit
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 52 includes 38 plus an additional 14 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
20
Multiple Choice
Medium
1 Mark
Sam evaluated 52 - 14 and wrote 66. 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.
21
Multiple Choice
Medium
1 Mark
A student claimed that 38 + 14 = 62 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:
38 + 14 equals exactly 52.
22
Multiple Choice
Medium
1 Mark
Complete the pattern: 38, 43, 48, [ ? ].
A
50
B
58
C
53
D
52
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
53
Step-by-Step Explanation:
The pattern increases by 5. 48 + 5 = 53.
23
Multiple Choice
Medium
1 Mark
Find the missing number: 38 + [ ? ] = 52.
A
15
B
14
C
38
D
13
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
14
Step-by-Step Explanation:
Missing value is 14 because 38 + 14 = 52.
24
Multiple Choice
Medium
1 Mark
In a school garden, there are 38 yellow marigolds and 14 purple petunias. How many flowers are blooming in total?
A
57 flowers
B
14 flowers
C
52 flowers
D
38 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52 flowers
Step-by-Step Explanation:
38 + 14 = 52 flowers.
25
Multiple Choice
Medium
1 Mark
A school library received 52 new graphic novels. Students checked out 14 novels on Monday. How many new novels are still on the shelf?
A
52 novels
B
38 novels
C
39 novels
D
14 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
38 novels
Step-by-Step Explanation:
52 - 14 = 38 novels remaining.
26
Multiple Choice
Medium
1 Mark
A baker packed 38 apple pies in the morning and 14 cherry pies in the afternoon. How many pies did the baker pack in all?
A
54 pies
B
52 pies
C
50 pies
D
38 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52 pies
Step-by-Step Explanation:
38 + 14 = 52 pies in total.
27
Multiple Choice
Easy
1 Mark
What number is 10 more than 38?
A
39
B
48
C
58
D
28
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
48
Step-by-Step Explanation:
38 + 10 = 48.
28
Multiple Choice
Easy
1 Mark
Which comparison is correct: 52 [ ? ] 47?
A
=
B
<
C
≈
D
>
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
52 is greater than 47.
29
Multiple Choice
Easy
1 Mark
Calculate: 52 - 14 = ?
A
14
B
38
C
39
D
37
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
38
Step-by-Step Explanation:
52 - 14 = 38.
30
Multiple Choice
Easy
1 Mark
In Chapter '3D Shapes', calculate: 38 + 14 = ?
A
62
B
51
C
53
D
52
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52
Step-by-Step Explanation:
38 + 14 = 52.
31
Multiple Choice
Hard
1 Mark
What is the difference between (67 + 10) and (31 + 10)?
A
67
B
31
C
36
D
46
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
36
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (67 + 10) - (31 + 10) = 67 - 31 = 36.
32
Multiple Choice
Hard
1 Mark
A secret number plus 36 equals 67. If you double the secret number, what is the result?
A
62
B
134
C
31
D
33
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
62
Step-by-Step Explanation:
The secret number is 31. Doubling it gives 31 × 2 = 62.
33
Multiple Choice
Hard
1 Mark
If 31 + 36 = 67, what is 36 + 31?
A
31
B
67
C
36
D
68
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
67
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
34
Multiple Choice
Hard
1 Mark
Why is 67 greater than 31?
A
Because 67 includes 31 plus an additional 36 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 67 includes 31 plus an additional 36 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
35
Multiple Choice
Medium
1 Mark
Sam evaluated 67 - 36 and wrote 103. 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.
36
Multiple Choice
Medium
1 Mark
A student claimed that 31 + 36 = 77 because 'we must add 10 to every answer'. Why is this student wrong?
A
The student subtracted instead
B
Addition is only for 1-digit numbers
C
Addition means combining only the given numbers without adding extra amounts
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:
31 + 36 equals exactly 67.
37
Multiple Choice
Medium
1 Mark
Complete the pattern: 31, 36, 41, [ ? ].
A
45
B
43
C
46
D
51
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
46
Step-by-Step Explanation:
The pattern increases by 5. 41 + 5 = 46.
38
Multiple Choice
Medium
1 Mark
Find the missing number: 31 + [ ? ] = 67.
A
31
B
36
C
35
D
37
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
36
Step-by-Step Explanation:
Missing value is 36 because 31 + 36 = 67.
39
Multiple Choice
Medium
1 Mark
In a school garden, there are 31 yellow marigolds and 36 purple petunias. How many flowers are blooming in total?
A
31 flowers
B
67 flowers
C
72 flowers
D
36 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
67 flowers
Step-by-Step Explanation:
31 + 36 = 67 flowers.
40
Multiple Choice
Medium
1 Mark
A school library received 67 new graphic novels. Students checked out 36 novels on Monday. How many new novels are still on the shelf?
A
31 novels
B
36 novels
C
32 novels
D
67 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
31 novels
Step-by-Step Explanation:
67 - 36 = 31 novels remaining.
41
Multiple Choice
Medium
1 Mark
A baker packed 31 apple pies in the morning and 36 cherry pies in the afternoon. How many pies did the baker pack in all?
A
65 pies
B
67 pies
C
69 pies
D
31 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
67 pies
Step-by-Step Explanation:
31 + 36 = 67 pies in total.
42
Multiple Choice
Easy
1 Mark
What number is 10 more than 31?
A
41
B
21
C
51
D
32
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
41
Step-by-Step Explanation:
31 + 10 = 41.
43
Multiple Choice
Easy
1 Mark
Which comparison is correct: 67 [ ? ] 62?
A
>
B
≈
C
=
D
<
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
67 is greater than 62.
44
Multiple Choice
Easy
1 Mark
Calculate: 67 - 36 = ?
A
36
B
32
C
31
D
30
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
31
Step-by-Step Explanation:
67 - 36 = 31.
45
Multiple Choice
Easy
1 Mark
In Chapter '3D Shapes', calculate: 31 + 36 = ?
A
68
B
67
C
77
D
66
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
67
Step-by-Step Explanation:
31 + 36 = 67.
46
Multiple Choice
Hard
1 Mark
What is the difference between (57 + 10) and (24 + 10)?
A
43
B
57
C
33
D
24
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
33
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (57 + 10) - (24 + 10) = 57 - 24 = 33.
47
Multiple Choice
Hard
1 Mark
A secret number plus 33 equals 57. If you double the secret number, what is the result?
A
114
B
26
C
48
D
24
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
48
Step-by-Step Explanation:
The secret number is 24. Doubling it gives 24 × 2 = 48.
48
Multiple Choice
Hard
1 Mark
If 24 + 33 = 57, what is 33 + 24?
A
57
B
58
C
24
D
33
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
57
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
49
Multiple Choice
Hard
1 Mark
Why is 57 greater than 24?
A
Because 57 includes 24 plus an additional 33 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 57 includes 24 plus an additional 33 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
50
Multiple Choice
Medium
1 Mark
Sam evaluated 57 - 33 and wrote 90. 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.