Printable Textbook: Long and Short - Level 3 | Mental Maths - Class 1 PDF Download

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Long and Short
Summary
Measurement: It is finding a number that shows the size or amount of 
something. We can measure many different things but mostly we measure 
length, area, etc.
For example:
 A    B C    D
  5 cm   6 cm
 Length of AB = 5 cm and Length of CD = 6 cm
 Here line segment CD is bigger than line segment AB.
Conversions:
It is the change between different units of measurement for the same 
quantity, typically through multiplicative conversion factor. For example:
 
1 Kilometre  =  1000 metre 
1 metre         =  100 centimetre
1 Kilometre  =  1,00,000 centimetre
1 decimetre  =  10 centimetre
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ME NT AL
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Long and Short
Summary
Measurement: It is finding a number that shows the size or amount of 
something. We can measure many different things but mostly we measure 
length, area, etc.
For example:
 A    B C    D
  5 cm   6 cm
 Length of AB = 5 cm and Length of CD = 6 cm
 Here line segment CD is bigger than line segment AB.
Conversions:
It is the change between different units of measurement for the same 
quantity, typically through multiplicative conversion factor. For example:
 
1 Kilometre  =  1000 metre 
1 metre         =  100 centimetre
1 Kilometre  =  1,00,000 centimetre
1 decimetre  =  10 centimetre
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Questions
1. How many metres are there in 2 kilometres?
2. How many kilometres are there in 7000 m?
3. How many centimetres are equal to 2 m 20 cm?
4. How many centimetres are these in 3 kilometres?
5. What should be added to 65 cm to make 1 m?
6. The total length of Komal’s ribbon is one metre. What is the length of half 
of her ribbon?
7. If 70 children can sit on a 30 m long carpet then how many children can 
sit on 15 m long carpet?
8. Complete the following:
 2 m = 25 cm + 85 cm + _______
9. Distance between points A and B is 45 cm and distance between points 
Band C is 155 cm. What is the total distance between point A and C if A, 
B and C lie on the same line? (Give your answer in metre) 
10. What should be subtracted from 1 m to get 45 cm?
11. Which one is the largest amongst 1 km, 100 m or 1000 cm?
12. Which one is the smallest amongst 5 km, 500 m or 5000 cm?
13. Kapila covers 60 cm in 2 steps. What will be length covered by her in one 
step?
14. The height of Geeta is 1 m 30 cm and the height of Sita in 10 cm less than 
Geeta’s height. What is the height of Sita?
15. The length of hands of Shashi, Vinti and Pooja are 15 cm, 14 cm, and 
16 cm respectively. Whose hand is the longest?
16. The height of Rani is 130 cm and the height of Vidhi is 18 cm more than 
Rani. What is the height of Vidhi?
17. Complete the following
 1 km = 900 m + 50 m + ____ cm
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ME NT AL
MA
T
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Long and Short
Summary
Measurement: It is finding a number that shows the size or amount of 
something. We can measure many different things but mostly we measure 
length, area, etc.
For example:
 A    B C    D
  5 cm   6 cm
 Length of AB = 5 cm and Length of CD = 6 cm
 Here line segment CD is bigger than line segment AB.
Conversions:
It is the change between different units of measurement for the same 
quantity, typically through multiplicative conversion factor. For example:
 
1 Kilometre  =  1000 metre 
1 metre         =  100 centimetre
1 Kilometre  =  1,00,000 centimetre
1 decimetre  =  10 centimetre
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MA
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Questions
1. How many metres are there in 2 kilometres?
2. How many kilometres are there in 7000 m?
3. How many centimetres are equal to 2 m 20 cm?
4. How many centimetres are these in 3 kilometres?
5. What should be added to 65 cm to make 1 m?
6. The total length of Komal’s ribbon is one metre. What is the length of half 
of her ribbon?
7. If 70 children can sit on a 30 m long carpet then how many children can 
sit on 15 m long carpet?
8. Complete the following:
 2 m = 25 cm + 85 cm + _______
9. Distance between points A and B is 45 cm and distance between points 
Band C is 155 cm. What is the total distance between point A and C if A, 
B and C lie on the same line? (Give your answer in metre) 
10. What should be subtracted from 1 m to get 45 cm?
11. Which one is the largest amongst 1 km, 100 m or 1000 cm?
12. Which one is the smallest amongst 5 km, 500 m or 5000 cm?
13. Kapila covers 60 cm in 2 steps. What will be length covered by her in one 
step?
14. The height of Geeta is 1 m 30 cm and the height of Sita in 10 cm less than 
Geeta’s height. What is the height of Sita?
15. The length of hands of Shashi, Vinti and Pooja are 15 cm, 14 cm, and 
16 cm respectively. Whose hand is the longest?
16. The height of Rani is 130 cm and the height of Vidhi is 18 cm more than 
Rani. What is the height of Vidhi?
17. Complete the following
 1 km = 900 m + 50 m + ____ cm
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18. Height of Manoj is 164 cm. How much more is the height of Manoj than 
1 m?
19. The length of one notebook is 30 cm. What will be the total length of 4 
such notebooks placed in a line (joined width wise)?
20. Madhu covers 25 cm in one step. What is the distance covered by her in 
8 steps?
21. In a long jump game, Ramesh’s jump is 175 cm long and Suresh’s jump is 
2 m long. Whose jump is longer and by how much?
22. The distance of Anurag’s school from his house is 5400 m. He covers a 
distance of 4 km by bus and the rest by auto. How much distance is covered 
by auto?
23. Complete it: 
 2 km = 1 km + _____ m + 2500 cm
24. How many centimetre are there in 5 metre?
25. If the length of one pencil is 20 cm, what will be the total length of 8 such 
pencils?
26. How many metres will be added to 628 m to make it equal to 2 kilometres?
27. There are three ribbons. The lengths of first and second ribbons are 35 cm 
and 55 cm respectively. What will be the length of third ribbon if its length 
is the sum of first two ribbons?
28. If Gunnu covers a distance of 30 cm in one step, how many steps are 
required to cover a distance of 3 metres?
29. If 5 dice can be placed on a 10 cm long line segment, then how many dice 
can be placed on a 40 cm long line segment?
30. The distance of the school from the house of Poonam, Kavita and Nehal 
are 1500 m, 2 km and 2500 cm respectively. Who lives farthest from  
school? 
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Long and Short
Summary
Measurement: It is finding a number that shows the size or amount of 
something. We can measure many different things but mostly we measure 
length, area, etc.
For example:
 A    B C    D
  5 cm   6 cm
 Length of AB = 5 cm and Length of CD = 6 cm
 Here line segment CD is bigger than line segment AB.
Conversions:
It is the change between different units of measurement for the same 
quantity, typically through multiplicative conversion factor. For example:
 
1 Kilometre  =  1000 metre 
1 metre         =  100 centimetre
1 Kilometre  =  1,00,000 centimetre
1 decimetre  =  10 centimetre
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Questions
1. How many metres are there in 2 kilometres?
2. How many kilometres are there in 7000 m?
3. How many centimetres are equal to 2 m 20 cm?
4. How many centimetres are these in 3 kilometres?
5. What should be added to 65 cm to make 1 m?
6. The total length of Komal’s ribbon is one metre. What is the length of half 
of her ribbon?
7. If 70 children can sit on a 30 m long carpet then how many children can 
sit on 15 m long carpet?
8. Complete the following:
 2 m = 25 cm + 85 cm + _______
9. Distance between points A and B is 45 cm and distance between points 
Band C is 155 cm. What is the total distance between point A and C if A, 
B and C lie on the same line? (Give your answer in metre) 
10. What should be subtracted from 1 m to get 45 cm?
11. Which one is the largest amongst 1 km, 100 m or 1000 cm?
12. Which one is the smallest amongst 5 km, 500 m or 5000 cm?
13. Kapila covers 60 cm in 2 steps. What will be length covered by her in one 
step?
14. The height of Geeta is 1 m 30 cm and the height of Sita in 10 cm less than 
Geeta’s height. What is the height of Sita?
15. The length of hands of Shashi, Vinti and Pooja are 15 cm, 14 cm, and 
16 cm respectively. Whose hand is the longest?
16. The height of Rani is 130 cm and the height of Vidhi is 18 cm more than 
Rani. What is the height of Vidhi?
17. Complete the following
 1 km = 900 m + 50 m + ____ cm
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18. Height of Manoj is 164 cm. How much more is the height of Manoj than 
1 m?
19. The length of one notebook is 30 cm. What will be the total length of 4 
such notebooks placed in a line (joined width wise)?
20. Madhu covers 25 cm in one step. What is the distance covered by her in 
8 steps?
21. In a long jump game, Ramesh’s jump is 175 cm long and Suresh’s jump is 
2 m long. Whose jump is longer and by how much?
22. The distance of Anurag’s school from his house is 5400 m. He covers a 
distance of 4 km by bus and the rest by auto. How much distance is covered 
by auto?
23. Complete it: 
 2 km = 1 km + _____ m + 2500 cm
24. How many centimetre are there in 5 metre?
25. If the length of one pencil is 20 cm, what will be the total length of 8 such 
pencils?
26. How many metres will be added to 628 m to make it equal to 2 kilometres?
27. There are three ribbons. The lengths of first and second ribbons are 35 cm 
and 55 cm respectively. What will be the length of third ribbon if its length 
is the sum of first two ribbons?
28. If Gunnu covers a distance of 30 cm in one step, how many steps are 
required to cover a distance of 3 metres?
29. If 5 dice can be placed on a 10 cm long line segment, then how many dice 
can be placed on a 40 cm long line segment?
30. The distance of the school from the house of Poonam, Kavita and Nehal 
are 1500 m, 2 km and 2500 cm respectively. Who lives farthest from  
school? 
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Answer Key
1. 2000 m 16. 148 cm
2. 7 km 17. 5000
3. 220 cm 18. 64 cm
4. 3,00,000 cm 19. 120 cm or 1 m 20 cm
5. 35 cm 20. 200 cm or 2 m
6. 50 cm or ½ m 21. Suresh jump, 25 cm
7. 35 children 22. 1400 m or 1 km 400 m
8. 90 cm 23. 975
9. 2 m 24. 500 cm
10. 55 cm 25. 160 cm
11. 1 km 26. 1372 m
12. 5000 cm 27. 90 cm
13. 30 cm 28. 10 steps
14. 1 m 20 cm or 120 cm 29. 20 dice
15. Pooja’s hand 30. Kavita
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Long and Short
Summary
Measurement: It is finding a number that shows the size or amount of 
something. We can measure many different things but mostly we measure 
length, area, etc.
For example:
 A    B C    D
  5 cm   6 cm
 Length of AB = 5 cm and Length of CD = 6 cm
 Here line segment CD is bigger than line segment AB.
Conversions:
It is the change between different units of measurement for the same 
quantity, typically through multiplicative conversion factor. For example:
 
1 Kilometre  =  1000 metre 
1 metre         =  100 centimetre
1 Kilometre  =  1,00,000 centimetre
1 decimetre  =  10 centimetre
21
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MA
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Questions
1. How many metres are there in 2 kilometres?
2. How many kilometres are there in 7000 m?
3. How many centimetres are equal to 2 m 20 cm?
4. How many centimetres are these in 3 kilometres?
5. What should be added to 65 cm to make 1 m?
6. The total length of Komal’s ribbon is one metre. What is the length of half 
of her ribbon?
7. If 70 children can sit on a 30 m long carpet then how many children can 
sit on 15 m long carpet?
8. Complete the following:
 2 m = 25 cm + 85 cm + _______
9. Distance between points A and B is 45 cm and distance between points 
Band C is 155 cm. What is the total distance between point A and C if A, 
B and C lie on the same line? (Give your answer in metre) 
10. What should be subtracted from 1 m to get 45 cm?
11. Which one is the largest amongst 1 km, 100 m or 1000 cm?
12. Which one is the smallest amongst 5 km, 500 m or 5000 cm?
13. Kapila covers 60 cm in 2 steps. What will be length covered by her in one 
step?
14. The height of Geeta is 1 m 30 cm and the height of Sita in 10 cm less than 
Geeta’s height. What is the height of Sita?
15. The length of hands of Shashi, Vinti and Pooja are 15 cm, 14 cm, and 
16 cm respectively. Whose hand is the longest?
16. The height of Rani is 130 cm and the height of Vidhi is 18 cm more than 
Rani. What is the height of Vidhi?
17. Complete the following
 1 km = 900 m + 50 m + ____ cm
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18. Height of Manoj is 164 cm. How much more is the height of Manoj than 
1 m?
19. The length of one notebook is 30 cm. What will be the total length of 4 
such notebooks placed in a line (joined width wise)?
20. Madhu covers 25 cm in one step. What is the distance covered by her in 
8 steps?
21. In a long jump game, Ramesh’s jump is 175 cm long and Suresh’s jump is 
2 m long. Whose jump is longer and by how much?
22. The distance of Anurag’s school from his house is 5400 m. He covers a 
distance of 4 km by bus and the rest by auto. How much distance is covered 
by auto?
23. Complete it: 
 2 km = 1 km + _____ m + 2500 cm
24. How many centimetre are there in 5 metre?
25. If the length of one pencil is 20 cm, what will be the total length of 8 such 
pencils?
26. How many metres will be added to 628 m to make it equal to 2 kilometres?
27. There are three ribbons. The lengths of first and second ribbons are 35 cm 
and 55 cm respectively. What will be the length of third ribbon if its length 
is the sum of first two ribbons?
28. If Gunnu covers a distance of 30 cm in one step, how many steps are 
required to cover a distance of 3 metres?
29. If 5 dice can be placed on a 10 cm long line segment, then how many dice 
can be placed on a 40 cm long line segment?
30. The distance of the school from the house of Poonam, Kavita and Nehal 
are 1500 m, 2 km and 2500 cm respectively. Who lives farthest from  
school? 
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Answer Key
1. 2000 m 16. 148 cm
2. 7 km 17. 5000
3. 220 cm 18. 64 cm
4. 3,00,000 cm 19. 120 cm or 1 m 20 cm
5. 35 cm 20. 200 cm or 2 m
6. 50 cm or ½ m 21. Suresh jump, 25 cm
7. 35 children 22. 1400 m or 1 km 400 m
8. 90 cm 23. 975
9. 2 m 24. 500 cm
10. 55 cm 25. 160 cm
11. 1 km 26. 1372 m
12. 5000 cm 27. 90 cm
13. 30 cm 28. 10 steps
14. 1 m 20 cm or 120 cm 29. 20 dice
15. Pooja’s hand 30. Kavita
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A
B
=
=
cm
cm
ACTIVITY 1
ESTIMATED LENGTH
Activity 1
1. What do you think is the length of these objects? Write your estimate. 
Then measure with the help of a ruler. What is the difference between  
the two?
Estimated 
Length  
(in cm)
Correct 
Length  
(in cm)
Difference  
in Length  
(in cm)
  
2. Which of the two lines are longer A or B? Take a guess.
 Then measure with the help of a ruler.
NOTE BOOK