Printable Textbook: Length, Capacity, Weight - Level 4 | Mental Maths - Class 1 PDF Download

 Page 1


M E
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Length
(Refer to the chapter # 2 and 12 of the NCERT Maths Book of Class IV)
Summary
The commonly used standard units for measuring length and distances are:
• Kilometre (km)
• Metre (m)
• Centimetre (cm)
• Millimetre (mm)
Tutty Speaks
Standard units are universally accepted 
units that are used for measurement.
(i) Lengths like distance between two walls of a room or height of a 
building are measured in metres .
(ii) Longer lengths and distances like the distance between two cities are 
measured in kilometres .
Page 2


M E
N
T
A
L
M
A
T H
S
 
Length
(Refer to the chapter # 2 and 12 of the NCERT Maths Book of Class IV)
Summary
The commonly used standard units for measuring length and distances are:
• Kilometre (km)
• Metre (m)
• Centimetre (cm)
• Millimetre (mm)
Tutty Speaks
Standard units are universally accepted 
units that are used for measurement.
(i) Lengths like distance between two walls of a room or height of a 
building are measured in metres .
(ii) Longer lengths and distances like the distance between two cities are 
measured in kilometres .
M E
N
T
A
L
M
A
T H
S
(iii) km is the largest unit and, 
 mm is the smallest unit for measuring length.
(iv) 1 km = 1000 m
 1 m   = 100 cm
 1 cm = 10 mm
(v) Heights of persons are usually measured in either cm or in feet  
& inches.
(vi) 1 feet = 12 inches
 1 feet = 30 cm
 1 inch = 2.5 cm (approximately)
Tutty speaks
If Ria’s height is 5 ft 6 inches. We can also
say that Ria is 66 inches or 165 cm tall.
Estimation
An approximate judgement of a number, calculation, quantity or a value is 
called estimation . Estimation gives an answer close to the exact answer. It 
might be a little more or little less than the exact answer.
For example:
• Delhi is about 250 km from Dehradun.
• A car is about 1 m wide.
Page 3


M E
N
T
A
L
M
A
T H
S
 
Length
(Refer to the chapter # 2 and 12 of the NCERT Maths Book of Class IV)
Summary
The commonly used standard units for measuring length and distances are:
• Kilometre (km)
• Metre (m)
• Centimetre (cm)
• Millimetre (mm)
Tutty Speaks
Standard units are universally accepted 
units that are used for measurement.
(i) Lengths like distance between two walls of a room or height of a 
building are measured in metres .
(ii) Longer lengths and distances like the distance between two cities are 
measured in kilometres .
M E
N
T
A
L
M
A
T H
S
(iii) km is the largest unit and, 
 mm is the smallest unit for measuring length.
(iv) 1 km = 1000 m
 1 m   = 100 cm
 1 cm = 10 mm
(v) Heights of persons are usually measured in either cm or in feet  
& inches.
(vi) 1 feet = 12 inches
 1 feet = 30 cm
 1 inch = 2.5 cm (approximately)
Tutty speaks
If Ria’s height is 5 ft 6 inches. We can also
say that Ria is 66 inches or 165 cm tall.
Estimation
An approximate judgement of a number, calculation, quantity or a value is 
called estimation . Estimation gives an answer close to the exact answer. It 
might be a little more or little less than the exact answer.
For example:
• Delhi is about 250 km from Dehradun.
• A car is about 1 m wide.
M E
N
T
A
L
M
A
T H
S
Questions
1. Which plant is the tallest?
(a) Mango (b) Coconut (c) Rose
2. Which one of these is the shortest?
(a) a saree (b) a muffler (c) a handkerchief
3. Which of these buildings is the highest?
(a) Qutab Minar (b) Y our school (c) India Gate
4. The farthest place from your home is .
(a) Y our school (b) Taj Mahal (c) India Gate
5. Fill in the most suitable unit of measurement:
(i) I am 4  tall.
(ii) The scale in my geometry box is 15  long.
(iii) The distance between Delhi and Amritsar is 540 .
(iv) Cloth is usually measured in .
6. The height of a cup is approximately
(a) 8 cm (b) 8 m (c) 8 mm
7. Approximate length of the blackboard in your classroom is
(a) 2.5 m (b) 25 cm (c) 25 mm
8. The height of Mount Everest is approximately
(a) 9 km (b) 9 m (c) 90 cm
9. 1000 times of 1 metre is
(a) 1 mm (b) 1 cm (c) 1 km
10. Which of the following is about 5 m?
(a) Height of a tree (b) Length of a cricket bat 
(c) Height of a bottle (d) Thickness of a book
Page 4


M E
N
T
A
L
M
A
T H
S
 
Length
(Refer to the chapter # 2 and 12 of the NCERT Maths Book of Class IV)
Summary
The commonly used standard units for measuring length and distances are:
• Kilometre (km)
• Metre (m)
• Centimetre (cm)
• Millimetre (mm)
Tutty Speaks
Standard units are universally accepted 
units that are used for measurement.
(i) Lengths like distance between two walls of a room or height of a 
building are measured in metres .
(ii) Longer lengths and distances like the distance between two cities are 
measured in kilometres .
M E
N
T
A
L
M
A
T H
S
(iii) km is the largest unit and, 
 mm is the smallest unit for measuring length.
(iv) 1 km = 1000 m
 1 m   = 100 cm
 1 cm = 10 mm
(v) Heights of persons are usually measured in either cm or in feet  
& inches.
(vi) 1 feet = 12 inches
 1 feet = 30 cm
 1 inch = 2.5 cm (approximately)
Tutty speaks
If Ria’s height is 5 ft 6 inches. We can also
say that Ria is 66 inches or 165 cm tall.
Estimation
An approximate judgement of a number, calculation, quantity or a value is 
called estimation . Estimation gives an answer close to the exact answer. It 
might be a little more or little less than the exact answer.
For example:
• Delhi is about 250 km from Dehradun.
• A car is about 1 m wide.
M E
N
T
A
L
M
A
T H
S
Questions
1. Which plant is the tallest?
(a) Mango (b) Coconut (c) Rose
2. Which one of these is the shortest?
(a) a saree (b) a muffler (c) a handkerchief
3. Which of these buildings is the highest?
(a) Qutab Minar (b) Y our school (c) India Gate
4. The farthest place from your home is .
(a) Y our school (b) Taj Mahal (c) India Gate
5. Fill in the most suitable unit of measurement:
(i) I am 4  tall.
(ii) The scale in my geometry box is 15  long.
(iii) The distance between Delhi and Amritsar is 540 .
(iv) Cloth is usually measured in .
6. The height of a cup is approximately
(a) 8 cm (b) 8 m (c) 8 mm
7. Approximate length of the blackboard in your classroom is
(a) 2.5 m (b) 25 cm (c) 25 mm
8. The height of Mount Everest is approximately
(a) 9 km (b) 9 m (c) 90 cm
9. 1000 times of 1 metre is
(a) 1 mm (b) 1 cm (c) 1 km
10. Which of the following is about 5 m?
(a) Height of a tree (b) Length of a cricket bat 
(c) Height of a bottle (d) Thickness of a book
M E
N
T
A
L
M
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T H
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11. Everyday, Jyoti travels 2 km by rickshaw from her house to the metro 
station. By metro she travels 20 km and then walks about 600 m to reach 
her office. Estimate the distance between her house and office.
(a) about 25 km (b) about 20 km 
(c) about 23 km (d) about 30 km
12. How many bricks of 20 cm length are needed to make one row of 1 metre 
long wall?
13. Racing track in Neerja’s school is 200 m long. To complete 2 km race, how 
many rounds of this track one needs to take?
14. Ram lives in Agra. He travels a distance of 210 km to reach Delhi. From 
Delhi, he plans to attend a meeting in Jaipur which is 262 km away from 
Delhi. How muck distance did he travel from Agra to Jaipur?
15. In a bookshelf of 45 cm width, how many books of width 9 mm can fit in?
16. (i)   Which point is the farthest from the centre O?
(ii) Which point is the nearest to the centre O?
17. Reena’s height is 1 m 40 cm. She is 15 cm taller than her brother but 25 cm 
shorter than her father. Who is the shortest?
5cm
G
A
B
C
D
E
F
9cm
3cm
7cm
6cm
4cm
8cm
Q
Page 5


M E
N
T
A
L
M
A
T H
S
 
Length
(Refer to the chapter # 2 and 12 of the NCERT Maths Book of Class IV)
Summary
The commonly used standard units for measuring length and distances are:
• Kilometre (km)
• Metre (m)
• Centimetre (cm)
• Millimetre (mm)
Tutty Speaks
Standard units are universally accepted 
units that are used for measurement.
(i) Lengths like distance between two walls of a room or height of a 
building are measured in metres .
(ii) Longer lengths and distances like the distance between two cities are 
measured in kilometres .
M E
N
T
A
L
M
A
T H
S
(iii) km is the largest unit and, 
 mm is the smallest unit for measuring length.
(iv) 1 km = 1000 m
 1 m   = 100 cm
 1 cm = 10 mm
(v) Heights of persons are usually measured in either cm or in feet  
& inches.
(vi) 1 feet = 12 inches
 1 feet = 30 cm
 1 inch = 2.5 cm (approximately)
Tutty speaks
If Ria’s height is 5 ft 6 inches. We can also
say that Ria is 66 inches or 165 cm tall.
Estimation
An approximate judgement of a number, calculation, quantity or a value is 
called estimation . Estimation gives an answer close to the exact answer. It 
might be a little more or little less than the exact answer.
For example:
• Delhi is about 250 km from Dehradun.
• A car is about 1 m wide.
M E
N
T
A
L
M
A
T H
S
Questions
1. Which plant is the tallest?
(a) Mango (b) Coconut (c) Rose
2. Which one of these is the shortest?
(a) a saree (b) a muffler (c) a handkerchief
3. Which of these buildings is the highest?
(a) Qutab Minar (b) Y our school (c) India Gate
4. The farthest place from your home is .
(a) Y our school (b) Taj Mahal (c) India Gate
5. Fill in the most suitable unit of measurement:
(i) I am 4  tall.
(ii) The scale in my geometry box is 15  long.
(iii) The distance between Delhi and Amritsar is 540 .
(iv) Cloth is usually measured in .
6. The height of a cup is approximately
(a) 8 cm (b) 8 m (c) 8 mm
7. Approximate length of the blackboard in your classroom is
(a) 2.5 m (b) 25 cm (c) 25 mm
8. The height of Mount Everest is approximately
(a) 9 km (b) 9 m (c) 90 cm
9. 1000 times of 1 metre is
(a) 1 mm (b) 1 cm (c) 1 km
10. Which of the following is about 5 m?
(a) Height of a tree (b) Length of a cricket bat 
(c) Height of a bottle (d) Thickness of a book
M E
N
T
A
L
M
A
T H
S
11. Everyday, Jyoti travels 2 km by rickshaw from her house to the metro 
station. By metro she travels 20 km and then walks about 600 m to reach 
her office. Estimate the distance between her house and office.
(a) about 25 km (b) about 20 km 
(c) about 23 km (d) about 30 km
12. How many bricks of 20 cm length are needed to make one row of 1 metre 
long wall?
13. Racing track in Neerja’s school is 200 m long. To complete 2 km race, how 
many rounds of this track one needs to take?
14. Ram lives in Agra. He travels a distance of 210 km to reach Delhi. From 
Delhi, he plans to attend a meeting in Jaipur which is 262 km away from 
Delhi. How muck distance did he travel from Agra to Jaipur?
15. In a bookshelf of 45 cm width, how many books of width 9 mm can fit in?
16. (i)   Which point is the farthest from the centre O?
(ii) Which point is the nearest to the centre O?
17. Reena’s height is 1 m 40 cm. She is 15 cm taller than her brother but 25 cm 
shorter than her father. Who is the shortest?
5cm
G
A
B
C
D
E
F
9cm
3cm
7cm
6cm
4cm
8cm
Q
M E
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18. Which is longer and by how much?
(a) 425 m 25 cm (b) 452 m 45 cm
19. Which is shorter and by how much?
(a) 610 m 92 cm (b) 160 m 83 cm
20. Neetu has three ribbons — red, green, and blue of length 2 m 63 cm, 5 m 
15 cm and 3 m 45 cm respectively. Which colour ribbon is the longest?
Answer Key
1. b
2. c
3. a
4. b
5. (i) feet (ii) cm (iii) km (iv) metre
6. a
7. a
8. a
9. c
10. a
11. c
12. 5 bricks
13. 10 rounds
14. 472 km
15. 5 books
16.  (i) Point B (ii) Point A
17. Reena’s brother
18. b, by 27 m 20 cm
19. b, by 450 m 9 cm
20. Green