1.) what is length

. length refers to the measurement of something from one end to other.

. it is a way to know how long wide or tall something is

2.) units of measurement

there are different units to measure length some common ones are:

. millimeter (mm) - the smallest unit . there are 10 millimeters in 1 centimeter.

. centimeter (cm) - 1 cm=10 mm . it is used for measuring shorter objects.

. meter (cm) - 1 meter= 100 centimeters. it is used for measuring medium lengths.

. kilometer (km) - kilometer = 1,000 meters. it is used for measuring longer distance like roads or highway

3.) conversion between unit

.1 meter (cm) = 100 centimeters (cm)

.1 centimeter (cm) = 10 millimeters (mm)

.1 1 kilometer (km) = 1,000 meters (cm)

example

. to convert 5 meters to cm

4.) measuring tools

some tools to measure length include:

. ruler or scale:used for measuring small lengths (in centimeters and millimeters).

. tape measure:used for longer measurements (in meters and centimeters)

. measuring wheel:used for measuring longer) distance (in kilometers or meters).

5.) how to measure length ?

. place the object on a flat surface.

. use the appropriate tool (like a ruler or tape measure)

. align the zero marks with the starting point of the object.

. read the measurement at the other end of the object.

6.) example of length measurements

. the length of a pencil is measured in centimeter (e.g.10cm)

. the length of a book can be measured in centimeters or inches.

. the distance from your house to your school might be measured in kilometer

7.) application of length measurement

.in daily:we measure length when we buy fabric measure a room for furniture or measure the height of a person.

. in science:length is used to measure the size of objects distances between stars or the growth of plants

8.) convert 3 meters into centimeter

1 meter = 100 cm

3 meter = 300 cm

.if rope is 150 cm long how many millimeters long is it ?

1cm=10 millimeter

150 cm 150 x 10 millimeter 1500 mm