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Question 12 Marks

Circle the bigger length and find the difference.
6 km 1,480m and 7 km 479m Difference— ________________

Answer

6 km 1480 m = 6000 m + 1480 m
= 7480 m 7 km 479 m
= 7000 m + 479 m
= 7479 m
So,7480 m > 7479 m
So, 6 km 1480 > 7 km 479 m
So, difference = 7480 m – 7479 m = 1 m

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Question 22 Marks

Circle the bigger length and find the difference.
5,678 m and 6 km Difference— ________________

Answer

6 km = 6 × 1000 m = 6000 m
5678 m < 6000 m
Difference = 6000 m 5678 m = 322 m

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Question 32 Marks

Circle the bigger length and find the difference.
2 m and 245 cm Difference— ________________

Answer

2 m = 200 cm
200 cm < 245 cm
So, 2 m < 245 cm
Difference = 245 cm – 200 cm = 45 cm

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Question 42 Marks

Circle the bigger length and find the difference.
1,020 mm and 1m Difference— ________________

Answer

1 m = 100 cm = 1000 mm 1020 mm > 1000 mm
Difference = 1020 mm -1000 mm = 20 mm

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Question 52 Marks

Circle the bigger length and find the difference.
20 cm and 201 mm Difference— ________________

Answer

20 cm = 200 mm 200 mm < 201 mm So, 20 mm < 201 mm
Difference = 201 mm – 200 mm = 1 mm

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Question 62 Marks

Circle the bigger length and find the difference.
26 mm and 2 cm Difference— ________________

Answer

2 cm = 20 mm 26 mm > 20 mm
Difference – 26 mm – 2 cm = 26 mm – 20 mm = 6 mm

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Question 72 Marks

Circle the bigger length and find the difference.
11 mm and 1 cm Difference— ________________

Answer

1 cm = 1 × 10 mm = 10 mm 11 mm > 10 mm So, 11 mm > 1 cm
Difference = 11 mm – 10 mm = 1 mm

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Question 82 Marks

Ritika is comparing the lengths of different rods. Compare them using <, =, > signs.
238 cm ____ 138 cm + 1 m

Answer

138 cm + 1 m = 138 cm + 100 cm
= 238 cm
Since, 238 cm = 238 cm
So, 238 cm = 138 cm 1 m

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Question 92 Marks

Ritika is comparing the lengths of different rods. Compare them using <, =, > signs.
2 m 150 cm ____ 3 m 50 cm

Answer

2 m 150 cm = 2 × 100 cm + 150 cm
= 200 cm + 150 cm = 350 cm
3 m 50 cm = 3 × 100 cm + 50 cm
= 300 cm + 50 cm = 350 cm
Since, 350 cm = 350 cm
So, 2 m 150 cm = 3 m 50 cm

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Question 102 Marks

Ritika is comparing the lengths of different rods. Compare them using <, =, > signs.
6 m 5 cm ____ 6 m 50 cm

Answer

6 m 5 cm = 6 × 100 cm+ 5 cm
= 600 cm + 5 cm = 605 cm
and 6 m 50 cm = 6 × 100 cm + 50 cm
= 600 cm + 50 cm = 650 cm
Since, 605 cm < 650 cm
∴ 6 m 5 cm < 6 m 50 cm.

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Question 112 Marks

Ritika is comparing the lengths of different rods. Compare them using <, =, > signs.
55 cm + 200 cm ____ 200 cm + 54 cm

Answer

55 cm + 200 cm = 255 cm
and 200 cm + 54 cm = 254 cm
Since, 255 cm > 254 cm
So, 55 cm + 200 cm > 200 cm + 54 cm

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Question 122 Marks

Ritika is comparing the lengths of different rods. Compare them using <, =, > signs.
456 cm ____ 5 m

Answer

456 cm = 456 cm
and 5 m = 5 × 100 = 500 cm
Since, 456 cm < 500 cm
So, 456 cm < 5 m

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Question 132 Marks

Identify the appropriate units for measuring each of the following.

Quantity	Unit of measurement Metre (m) or centimetre (cm)
Height of India Gate	42
Length of a handkerchief	40
Depth of a well	50
Length of a mobile phone	13
Length of an elephant's trunk	2
Distance between two buttons on a shirt	5

Answer

Quantity	Unit of measurement Metre (m) or centimetre (cm)
Height of India Gate	42 m
Length of a handkerchief	40 cm
Depth of a well	50 m
Length of a mobile phone	13 cm
Length of an elephant's trunk	2 m
Distance between two buttons on a shirt	5 cm

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Question 142 Marks

When we walk 1,000 m, we say we have walked 1 km.
1,000 m = 1 km
Kilo stands for thousand. This unit is used to measure long distances.

Length of rope	Number of ropes needed to make 1 km
1,000 m	1
100 m
10 m
200 m
500 m
250 m

Answer

Length of rope	Number of ropes needed to make 1 km
1,000 m	1
100 m	10
10 m	100
200 m	5
500 m	2
250 m	4

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Question 152 Marks

Measure the following object with a ruler and write their length in cm and mm:
The height of your eraser ________________

Answer

self

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Question 162 Marks

Measure the following object with a ruler and write their length in cm and mm:
The length of a pencil ________________

Answer

self

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Question 172 Marks

Measure the following object with a ruler and write their length in cm and mm:
The width of your math textbook ________________

Answer

self

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