Lesson 11.1: Straight and Curved Lines
Identify and draw straight vs curved lines.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
#StraightAndCurvedLines #DrawingLines #GeometryLines
Straight and Curved Lines (Drawing with and without Rulers)
Lines are the building blocks of all drawings and letters! A line can be drawn straight using a ruler or curved freehand.
Horizontal Line
Vertical Line
Slanting Line
Curved Line
Lines: Horizontal (sleeping), Vertical (standing), Slanting, and Curved lines.
1. Straight Lines vs Curved Lines
• Straight Line: Follows the shortest path between two points without bending or turning. We use a ruler to draw perfect straight lines.
• Curved Line: Bends and twists smoothly, like a rainbow, a snake, or the letter 'S'.
Letters Check: The letters A, E, F, H, I, K, L, M, N, T, V, W, X, Y, Z are made ONLY of straight lines! The letters C, O, S are made of curved lines. Letters like B, D, G, J, P, R, U have both!
2. String Activity
Hold a piece of thread between two hands. When pulled tight, it forms a straight line. When loosened, it dips into a curved line!
Try It: Can you draw a circle with straight lines? No, a circle needs a curved line!
💡 Key Learning Takeaways
- Straight lines do not bend; curved lines bend smoothly.
- Rulers help draw straight lines.
- Alphabet letters are made of straight and curved lines.
🎯 Key Learning Takeaways
Straight and curved lines.
📄 Printable Worksheets (10 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
WL-G2-C11-W10
A4 • 15 Qs
Lines and Directions — Worksheet 10
Curriculum Excellence & Final Review
WL-G2-C11-W09
A4 • 15 Qs
Lines and Directions — Worksheet 9
Mastery Assessment & Progress Check
WL-G2-C11-W08
A4 • 15 Qs
Lines and Directions — Worksheet 8
Mixed Review & Reinforcement
WL-G2-C11-W07
A4 • 15 Qs
Lines and Directions — Worksheet 7
Everyday Applications & Story Maths
WL-G2-C11-W06
A4 • 15 Qs
Lines and Directions — Worksheet 6
Critical Thinking & Deep Understanding
WL-G2-C11-W05
A4 • 15 Qs
Lines and Directions — Worksheet 5
Speed Challenge & Quick Check
WL-G2-C11-W04
A4 • 15 Qs
Lines and Directions — Worksheet 4
Problem Solving & Real-Life Stories
WL-G2-C11-W03
A4 • 15 Qs
Lines and Directions — Worksheet 3
Hands-on Visual Activity & Matching
WL-G2-C11-W02
A4 • 15 Qs
Lines and Directions — Worksheet 2
Essential Practice & Skill Builder
WL-G2-C11-W01
A4 • 15 Qs
Lines and Directions — 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 (70 + 10) and (48 + 10)?
A
22
B
70
C
32
D
48
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
22
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (70 + 10) - (48 + 10) = 70 - 48 = 22.
2
Multiple Choice
Hard
1 Mark
A secret number plus 22 equals 70. If you double the secret number, what is the result?
A
96
B
140
C
50
D
48
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
96
Step-by-Step Explanation:
The secret number is 48. Doubling it gives 48 × 2 = 96.
3
Multiple Choice
Hard
1 Mark
If 48 + 22 = 70, what is 22 + 48?
A
70
B
71
C
22
D
48
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
70
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
4
Multiple Choice
Hard
1 Mark
Why is 70 greater than 48?
A
Because {v1} is an even number
B
Numbers ending in 0 are always smaller
C
Because {tot} has a bigger first digit
D
Because 70 includes 48 plus an additional 22 items
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 70 includes 48 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 70 - 22 and wrote 92. What was Sam's mistake?
A
He added instead of subtracting
B
He multiplied by 2
C
He forgot the units place
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 48 + 22 = 80 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
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:
48 + 22 equals exactly 70.
7
Multiple Choice
Medium
1 Mark
Complete the pattern: 48, 53, 58, [ ? ].
A
68
B
62
C
63
D
60
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
63
Step-by-Step Explanation:
The pattern increases by 5. 58 + 5 = 63.
8
Multiple Choice
Medium
1 Mark
Find the missing number: 48 + [ ? ] = 70.
A
22
B
21
C
23
D
48
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
22
Step-by-Step Explanation:
Missing value is 22 because 48 + 22 = 70.
9
Multiple Choice
Medium
1 Mark
In a school garden, there are 48 yellow marigolds and 22 purple petunias. How many flowers are blooming in total?
A
75 flowers
B
48 flowers
C
22 flowers
D
70 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
70 flowers
Step-by-Step Explanation:
48 + 22 = 70 flowers.
10
Multiple Choice
Medium
1 Mark
A school library received 70 new graphic novels. Students checked out 22 novels on Monday. How many new novels are still on the shelf?
A
48 novels
B
49 novels
C
70 novels
D
22 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
48 novels
Step-by-Step Explanation:
70 - 22 = 48 novels remaining.
11
Multiple Choice
Medium
1 Mark
A baker packed 48 apple pies in the morning and 22 cherry pies in the afternoon. How many pies did the baker pack in all?
A
48 pies
B
72 pies
C
70 pies
D
68 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
70 pies
Step-by-Step Explanation:
48 + 22 = 70 pies in total.
12
Multiple Choice
Easy
1 Mark
What number is 10 more than 48?
A
38
B
68
C
49
D
58
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
58
Step-by-Step Explanation:
48 + 10 = 58.
13
Multiple Choice
Easy
1 Mark
Which comparison is correct: 70 [ ? ] 65?
A
≈
B
=
C
<
D
>
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
70 is greater than 65.
14
Multiple Choice
Easy
1 Mark
Calculate: 70 - 22 = ?
A
47
B
22
C
49
D
48
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
48
Step-by-Step Explanation:
70 - 22 = 48.
15
Multiple Choice
Easy
1 Mark
In Chapter 'Lines and Directions', calculate: 48 + 22 = ?
A
70
B
80
C
71
D
69
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
70
Step-by-Step Explanation:
48 + 22 = 70.
16
Multiple Choice
Hard
1 Mark
What is the difference between (60 + 10) and (41 + 10)?
A
19
B
29
C
60
D
41
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
19
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (60 + 10) - (41 + 10) = 60 - 41 = 19.
17
Multiple Choice
Hard
1 Mark
A secret number plus 19 equals 60. If you double the secret number, what is the result?
A
43
B
82
C
120
D
41
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
82
Step-by-Step Explanation:
The secret number is 41. Doubling it gives 41 × 2 = 82.
18
Multiple Choice
Hard
1 Mark
If 41 + 19 = 60, what is 19 + 41?
A
19
B
41
C
61
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).
19
Multiple Choice
Hard
1 Mark
Why is 60 greater than 41?
A
Because {v1} is an even number
B
Because {tot} has a bigger first digit
C
Because 60 includes 41 plus an additional 19 items
D
Numbers ending in 0 are always smaller
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 60 includes 41 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 60 - 19 and wrote 79. What was Sam's mistake?
A
He multiplied by 2
B
He forgot the units place
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.
21
Multiple Choice
Medium
1 Mark
A student claimed that 41 + 19 = 70 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 student subtracted instead
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:
41 + 19 equals exactly 60.
22
Multiple Choice
Medium
1 Mark
Complete the pattern: 41, 46, 51, [ ? ].
A
56
B
55
C
53
D
61
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
56
Step-by-Step Explanation:
The pattern increases by 5. 51 + 5 = 56.
23
Multiple Choice
Medium
1 Mark
Find the missing number: 41 + [ ? ] = 60.
A
18
B
19
C
20
D
41
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
19
Step-by-Step Explanation:
Missing value is 19 because 41 + 19 = 60.
24
Multiple Choice
Medium
1 Mark
In a school garden, there are 41 yellow marigolds and 19 purple petunias. How many flowers are blooming in total?
A
60 flowers
B
65 flowers
C
41 flowers
D
19 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
60 flowers
Step-by-Step Explanation:
41 + 19 = 60 flowers.
25
Multiple Choice
Medium
1 Mark
A school library received 60 new graphic novels. Students checked out 19 novels on Monday. How many new novels are still on the shelf?
A
19 novels
B
60 novels
C
42 novels
D
41 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
41 novels
Step-by-Step Explanation:
60 - 19 = 41 novels remaining.
26
Multiple Choice
Medium
1 Mark
A baker packed 41 apple pies in the morning and 19 cherry pies in the afternoon. How many pies did the baker pack in all?
A
58 pies
B
41 pies
C
60 pies
D
62 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
60 pies
Step-by-Step Explanation:
41 + 19 = 60 pies in total.
27
Multiple Choice
Easy
1 Mark
What number is 10 more than 41?
A
61
B
31
C
51
D
42
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
51
Step-by-Step Explanation:
41 + 10 = 51.
28
Multiple Choice
Easy
1 Mark
Which comparison is correct: 60 [ ? ] 55?
A
≈
B
>
C
=
D
<
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
60 is greater than 55.
29
Multiple Choice
Easy
1 Mark
Calculate: 60 - 19 = ?
A
41
B
42
C
40
D
19
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
41
Step-by-Step Explanation:
60 - 19 = 41.
30
Multiple Choice
Easy
1 Mark
In Chapter 'Lines and Directions', calculate: 41 + 19 = ?
A
70
B
59
C
60
D
61
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
60
Step-by-Step Explanation:
41 + 19 = 60.
31
Multiple Choice
Hard
1 Mark
What is the difference between (50 + 10) and (34 + 10)?
A
16
B
50
C
34
D
26
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
16
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (50 + 10) - (34 + 10) = 50 - 34 = 16.
32
Multiple Choice
Hard
1 Mark
A secret number plus 16 equals 50. If you double the secret number, what is the result?
A
34
B
100
C
36
D
68
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
68
Step-by-Step Explanation:
The secret number is 34. Doubling it gives 34 × 2 = 68.
33
Multiple Choice
Hard
1 Mark
If 34 + 16 = 50, what is 16 + 34?
A
50
B
34
C
51
D
16
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
50
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
34
Multiple Choice
Hard
1 Mark
Why is 50 greater than 34?
A
Because {v1} is an even number
B
Numbers ending in 0 are always smaller
C
Because {tot} has a bigger first digit
D
Because 50 includes 34 plus an additional 16 items
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 50 includes 34 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 50 - 16 and wrote 66. 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.
36
Multiple Choice
Medium
1 Mark
A student claimed that 34 + 16 = 60 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:
34 + 16 equals exactly 50.
37
Multiple Choice
Medium
1 Mark
Complete the pattern: 34, 39, 44, [ ? ].
A
48
B
46
C
54
D
49
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
49
Step-by-Step Explanation:
The pattern increases by 5. 44 + 5 = 49.
38
Multiple Choice
Medium
1 Mark
Find the missing number: 34 + [ ? ] = 50.
A
16
B
15
C
17
D
34
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
16
Step-by-Step Explanation:
Missing value is 16 because 34 + 16 = 50.
39
Multiple Choice
Medium
1 Mark
In a school garden, there are 34 yellow marigolds and 16 purple petunias. How many flowers are blooming in total?
A
50 flowers
B
55 flowers
C
34 flowers
D
16 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
50 flowers
Step-by-Step Explanation:
34 + 16 = 50 flowers.
40
Multiple Choice
Medium
1 Mark
A school library received 50 new graphic novels. Students checked out 16 novels on Monday. How many new novels are still on the shelf?
A
35 novels
B
16 novels
C
50 novels
D
34 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
34 novels
Step-by-Step Explanation:
50 - 16 = 34 novels remaining.
41
Multiple Choice
Medium
1 Mark
A baker packed 34 apple pies in the morning and 16 cherry pies in the afternoon. How many pies did the baker pack in all?
A
48 pies
B
50 pies
C
52 pies
D
34 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
50 pies
Step-by-Step Explanation:
34 + 16 = 50 pies in total.
42
Multiple Choice
Easy
1 Mark
What number is 10 more than 34?
A
54
B
44
C
24
D
35
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
44
Step-by-Step Explanation:
34 + 10 = 44.
43
Multiple Choice
Easy
1 Mark
Which comparison is correct: 50 [ ? ] 45?
A
>
B
=
C
≈
D
<
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
50 is greater than 45.
44
Multiple Choice
Easy
1 Mark
Calculate: 50 - 16 = ?
A
34
B
33
C
35
D
16
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
34
Step-by-Step Explanation:
50 - 16 = 34.
45
Multiple Choice
Easy
1 Mark
In Chapter 'Lines and Directions', calculate: 34 + 16 = ?
A
51
B
49
C
50
D
60
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
50
Step-by-Step Explanation:
34 + 16 = 50.
46
Multiple Choice
Hard
1 Mark
What is the difference between (40 + 10) and (27 + 10)?
A
23
B
40
C
27
D
13
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
13
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (40 + 10) - (27 + 10) = 40 - 27 = 13.
47
Multiple Choice
Hard
1 Mark
A secret number plus 13 equals 40. If you double the secret number, what is the result?
A
54
B
29
C
80
D
27
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
54
Step-by-Step Explanation:
The secret number is 27. Doubling it gives 27 × 2 = 54.
48
Multiple Choice
Hard
1 Mark
If 27 + 13 = 40, what is 13 + 27?
A
40
B
27
C
13
D
41
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
49
Multiple Choice
Hard
1 Mark
Why is 40 greater than 27?
A
Because 40 includes 27 plus an additional 13 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 40 includes 27 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 40 - 13 and wrote 53. What was Sam's mistake?
A
He divided the numbers
B
He multiplied by 2
C
He forgot the units place
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.