Page 117 - Maths Class 05

6 Measurement

Looking Back

Length

Length is a measure of how long something is from end to end. This may include distance,
which means the space between two points or objects.

Units of Length

Units are used to measure the length and distance.

The most commonly used metric units of length are kilometre (km), metre (m), centimetre (cm)
and millimetre (mm). These units of length are related as follows :

10 mm = 1 cm

100 cm = 1 m

1000 m = 1 km

Representation of these units with their values is shown in the following chart :

Standard
Higher units Lower units
units

Unit km hm dam m dm cm mm

1 1 1
Value 1000 m 100 m 10 m 1 m m m m
10 100 1000

From the above given chart, we can observe these relationships.

1
1 km = 1000 m 1 dm = m = 0.1 m
10

1
1 hm = 100 m 1 cm = m = 0.01 m
100

1
1 dam = 10 m 1 mm = m = 0.001 m
1000

Mathematics-5 117