Fractions maths

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Fractions : 

Fractions Math project Done by Polman

Fractions-history : 

Fractions-history Were used already during 1800BC. Babylonians invented it In 1650BC, Egypt start to use them In 100AD, the Chinese devise a system for calculation with fractions 1585, Simon Stevin sets out a theory of decimal fractions. From the 17th century, fractions are commonly used until today.

Fractions: What are they? : 

Fractions: What are they? Example: Fractions is used in math to represent parts.

Fractions : 

Fractions 1/2 2 is the whole number 1 represents the part / divide Numerator Denominator

Fractions : 

Fractions Fractions can be expressed as Percents, decimals and ratios Example: ½ = 50% Example ½ = 0.5 Example ½ = 1:2 Denominator of a fraction is always 100% Example: ½ = the two is 100%

Fractions: Addition : 

Fractions: Addition Example: ¾ + 2/3=? Step one: common Denominator: 3, 4 Denominator: 12 Step 2: multiply nominator to give 12: 3x3=9 and 2x4=8 Step 3: 9/12+8/12= 17/12 17/12 is the final result

Fractions: Substraction : 

Fractions: Substraction Substraction is the same as addition, except we do minus instead of plus: Example on table: 4/7 – 3/5=?

Fractions: Multiplication : 

Fractions: Multiplication 2 examples: ½ x 7/3= 7/6....just multiply nominator*nominator and denominator*denominator Multiplication of mixed numbers: 3x2 ¾ =? Result= 33/4

Fractions: division : 

Fractions: division Example: 3:4/5= 3x5/4 Just switch the fraction‘s nominator with denominator..show on board.

Fraction: decimals : 

Fraction: decimals ½ = just divide 1 by 2 = 0.5 ¾ = just divide 3 by 4 = 0.75 Examples on board: 9/17 Result: 0.529

Sources : 

Sources http://www.themathpage.com/arith/fractions-into-decimals-1.htm http://math2.org/math/general/arithmetic/fradec.htm Paper

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