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# Application on decimals by Karthikeyan's team

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An example of integration of technology in Maths lesson entitled Decimals

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### Application on decimals by Karthikeyan's team

1. 1. APPLICATION ON DECIMALS 1)   N.Karthikeyan       CAPTAIN   2) Rupanuga P. Mishra   Vice captain   3)   4)   5)   6)   Yash Agarwal   Anwesh Saha   Rachit Yadav   Mudit Sarda                   Team member   Team member   Team member   Team member 02/13/14
2. 2. Historical facts. REFERENCE http://education.ed.pacificu.edu/charlesm/courses/m athsci/numsys/numsys.html For the information REFERENCE http://bmisclass2011.wikispaces.com/Year7unit5TheN umberZero For the picture Babylon The Babylonian cuneiform method of recording quantities, approximately 5000 years old, is among the oldest numeral systems in existence. Egypt The Egyptian method for recording quantitities is based on 10 with a symbol for 1, ten, and each successive power of ten. A distinct hieroglypic was used for each power of 10. Mayan The Mayan system was a base- 20 system (vigesimal) that used a system of bars and dots in a vertical place value system. A dot stood for one and a bar stood for five. Roman The Roman method (no place value, instead an additive system, rules of subtraction, base ten with fives)
3. 3. Who invented the modern number system Reference http://en.wikipedia.org/wiki/File:Arabic_numerals-en.svg For the picture The Indians invented the modern number system. It is often called Arabic numerals because it came to Europe through the Arabs. But Arabs themselves call it as "HindSaa" meaning - "given by Hindus or Indians". The Persians copied the Indian number system and then passed it on to the Arabs. Then an Italian mathematician named Fibonacci traveled to Algeria to study. When he came back home, he brought the Indian numerals with him. He wrote about the system in his book "Liber Abaci.“. This system has been really used in Europe . Today it is the number system used by the whole world.
4. 4. How do ancients use number systems and how decimal system is different from other systems? They used it for practical purposes like counting money, trades and other business. The Indian decimal system was different from other systems as it had the number 0 in it. Zero is the most important number in the decimal system. References http://bmisclass2011.wikispaces.com/Year7un it5TheNumberZero For the picture
5. 5. INDIAN DECIMAL SYSTEM Indian Decimal System uses the concept of Face Value and Place Value as described below PLACE VALUE FACE VALUE PLACE VALUE is relative, it changes depending upon the place where it is situated. Place value depends upon multiples of 10. Found only in decimal system. FACE VALUE is the exact value of a number that cannot be changed. Found in all systems.
6. 6. Use of Decimal System • • • • • Measurement. Currency. Weight. Volume. Nutrients in food. • Conclusion: These help us in daily life
7. 7. Decimal System in measurement • In measuring objects we use the scale based on decimal system. The most common scale is metric scale. • Metric scale consists of a standard unit meter. All other practical scales are relative to it like centimeter, millimeter and kilometer.
8. 8. Decimal System in currency • Currency is separated in two domains in every country. For example: rupee & paisa in India, dollar & cents in U.S.A, euro & cents in Europe & pounds & penny in England. 1 rupee is 100 paisa & so it is in every country. The product I am purchasing in the video is Rs 40and 50 paise which is written as Rs 40.5
9. 9. Decimal system in weights • While measuring weights we use the units Kilograms and grams which is Kg and g in short. For example my weight is 30 Kg and 300 grams which is written as 30.3 Kg in decimal system.
10. 10. Decimal system in volume • Volumes are measured in litres and millilitres. 1 litre is equal to 1000 millilitres. If we make a box of 10 cm x 10 cm x 10 cm then its volume is 1 litre. 1 millilitre is a cube of 1cm x 1cm x 1cm.
11. 11. Use of Decimal System in Food Nutrients. Milk Nutrients in percent. Percent is a way of representing equivalent fraction with denominator 100. Principal Whole milk components Skimmed milk Moisture 87.40% 90.50% Lactose 4.90% 5.10% Fat 3.50% 0.10% Protein 3.50% 3.60% Ash 0.70% 0.70%
12. 12. From the PowerPoint I hope you saw the use of decimal systems. nc Co ion us l