How to perform Unit Conversions

Previously we have discussed about history of rational and irrational numbers and now we are going to discuss about Unit Conversions, In day-to-day life we deal with many measurement issues like somebody ask us about your weight and height and if you don’t  know about measurement of height and weight , then you don’t have answer . So, it is require to know units of measurement . In today's session  we all are going to discuss what is Units of measurements which comes under gujarat state education board, types of units and how we convert one unit into another unit .  
First of all we discuss what is unit of measurements and solve math problems related to it. 
Measurement is the process which is use to determine physical quantity in length, time, temperature etc. ,to standard unit of measurement like  length in meter, time in second or temperature in degree Celsius.
Now further we discuss type of units and how we done conversion in units of measurements   :
There are basically five major units of measurement -

• measurement of length : Basically measurement of length is done in meter and we have to know all basic conversions about length like  kilometer to meter , meter to centimeter etc . So, I show you a chart which shows how length unit conversion is happened -

1 kilometer = 10 hectometers
1 hectometer = 10 decameter
1 decameter = 10 meter
1 meter = 10 decimeter
1 decimeter = 10 centimeter
1 centimeter = 10 millimeter
1 foot = 12 inch
1 inch = 2.56 centimeter
If you know all these conversions about length then you can easily measure physical quantity in length term .(want to Learn more about Unit Conversions ,click here),

• measurement of weight : We generally measure weight in kilogram , but if we want to measure weight in grams and pounds , you have to  know all conversions about weight . I show you a chart which shows all conversions about weight -

1 matric ton = 1000 kilogram
1 kilogram = 1000 gram
1 gram = 1000 milligram
With the help of this chart, we can easily measure weight .

• measurement of volume : We can generally measure volume in liter and we want to measure volume in other unit of liter, we have to know all  conversions about volume and following chart make easier these things to us -

1 liter = 1000 milliliter
1 milliliter = 0.0338 ounces
1 ounces = 29.57 milliliter
1 cup = 236.6 milliliter
With the help of this chart , we can easily measure things about volume .

• measurement of time : Basically we measure time in second , but if we want to measure time in millisecond or microsecond , then we have to  all things about time conversion and following chart shows all conversions about time -

1 year = 12 months
1 year = 365 days
1 day = 24 hours
1 hours = 60 minutes
1 minutes = 60 second
1 millisecond = .001 second
1 microsecond = .000001 second
This chart teach us how we measure time .

• measurement of temperature : Basically we measure temperature in Kelvin , but if we want to measure time in Celsius or other unit of  temperature , then we have to all things about temperature conversion and following chart shows us how we done conversions of    temperature   -

• conversion from kelvin to Celsius : K = C + 273.15
• conversion from Celsius to farenheit : 9/5 C = F - 32
• conversion from farenheit to rankine : R = F + 459.5
• conversion from rankine to kelvin : 9K = 5R

This chart teach us how we convert one temperature unit into another temperature unit , like we want to convert Celsius into Kelvin , then we  have to use K = C + 273 .
So, in this session we learn grade IV's important mathematic topic Units of measurement , types of units and Unit conversions and if anyone want to know about how to Solve Decimals then they can refer to internet and text books for understanding it more precisely.Read more maths topics of different grades such as Mean and median in Maths in the next session here.