### Measurement of Length

**Tags:**Standard unit of length for second grade, Introducing concept of measurement for kids, Unit of length, Non - standard unit of length, Measuring length for class II, Measurement of length for class 2, Worksheet PDF, Examples and Practice Page on Measurement of length for grade 2, Word problem on measurement of length, Instrument of measurement of length, Meter, Kilometer, Centimeter, Hand span, Cubit, Hand, Foot.Measurement of Length

Length means how long something is. We see many things around us. Some are short in length such as paper clip, pencil, pen, notebook etc., some are long in length such as tree, electric pole, cloth, room, train track and some are very long such as distance between two places. We need to select suitable unit to measure these lengths.

**Non Standard Units of Measurement**In early days body parts were used to measure length. But measurements taken by these means are not accurate and consistent. If we use our hand span to measure length, the measurement taken by different person will vary as our hand spans are not equal. Example: a child hand span is smaller than the adult. So, hand span, hand, foot and cubit are not standard units of measurement.

**Standard Units of Measurement**We observed that nonstandard unit of measurement does not give same results. So, we need to use some standard units for measuring lengths. Otherwise the measurements of an object will be different when measured in different ways. We use different units of length to measure different lengths.

__Example:__We measure length of table edge, length of chalk, length of pencil etc. in centimeters (cm), length of a room, height of tree, length of cloth, height of an electric pole etc. in meters (m) and longer distance such distance between two places in kilometers (km).**Points to be remembered**- The standard unit of length is meter.
- One meter is divided into 100 smaller units called
centimeters.

So, 1m = 100cm

- Short form of meter is “m”, centimeter is “cm” and
kilometer is “km”.
- 1000 m put together to make a bigger unit called a
kilometer.

**Instrument of Measurement of Length**We use metric ruler, metric stick, tape, rod etc. to measure length.

**Word Problem**__Example 1__: Length of blue rope is 7m and length of red rope is 5m. Which rope is bigger and by how much?__Example2:__Ria travelled 2km by car and 5 km by bus. How much distance did she travel in all?- The standard unit of length is meter.
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