SALVAVIDAS II PERIODO

ACTIVIDADES DE REFUERZO

Multiplication properties (commutative, associative & distributive)

Multiplication by 10, 100, and 1000

Simplifying fractions

Units of Length

Length is the term used for identifying the size of an object or distance from one point to the other. For example, the length of a ruler given below tells us how long the ruler is.

What Is Length?

Measurement of length can be defined as an act of identifying the length of objects in some standard or non-standard units. The skill to measure the length is very important in our everyday life.

Suppose Mathew is going to a store with his friend and he sees a beautiful picture frame that can be placed in his parents’ bedroom. But how would he tell them the length of the frame? He can do that if he knows the length in a certain unit, say 3 feet. In the image given below, the length of the picture frame is 3 feet.

Units to Measure Length

We can divide the standard units of measuring length into two types:

A. Metric System

The metric system includes kilometer, hectometer, decameter, meter, decimeter, centimeter, and millimeter. There is a relationship between these units. The base unit is meters. The relationship of every other unit with the base unit (meters) is given below:

1 kilometer (km) = 1000 meters (m)
1 hectometer (hm) = 100 m
1 decameter (dam) = 10 m
1 decimeter (dm) = 1/10 m = 0.1 m
1 centimeter (cm) = 1/100 m = 0.01 m
1 millimeter (mm) = 1/1000 m = 0.001 m

B. Imperial System

The imperial system includes feet, yard, inches, etc. The relation is given by:

1 yard = 3 feet

1 feet = 12 inches

Metric to Imperial System

1 m = 3.28 feet

1 m = 39.37 inches

Imperial to Metric System

1 inch = 2.54 cm

1 foot = 30.48 cm

1 foot = 0.3048 m

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