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Understanding Fractions
 In mathematics, the word ‘fraction’ represents a part
 that is broken off from a whole. A broken whole may be
 a part of a cake, a part of a stick, or a part of a group, etc.



 A fraction is a part of a whole thing or a part of a
 group of things.
For example, the pizza on the left is a whole. There is one
pizza, and it is cut into five equal slices, or parts. When we

say, ‘   of the pizza has been eaten,’ we mean that two of

the five equal slices of the pizza have been eaten.
Examples:
 Write each shaded area as a fraction.
Terms of a Fraction
 A fraction consists of two numerals with a horizontal bar
  between them. The horizontal bar is called the fraction
  bar.
 The number above the fraction bar is called the
  numerator and the the number below the fraction bar is
  called the denominator. The numerator and the
  denominator are called the terms of the fraction.
Examples:
Examples:
Examples:
Write a fraction to describe each situation.

a. There are fifteen boys and thirteen girls in a class. Which
part of the class are girls?

b. Five out of the eleven players on a football team have a
yellow card.

c. A box of compact discs contains three Maths CDs, four
Physics CDs, five Chemistry CDs, four audio CDs, and five
video CDs. How many of the CDs are
related to school subjects?
Types of fraction
 Proper (Simple) Fractions
 If the numerator of a fraction is smaller than its
  denominator, it is called a proper (or simple) fraction.
Proper (Simple) Fractions
Types of fraction
 Improper Fractions
 If the numerator of a fraction is greater than or equal
  to its denominator, it is called an improper fraction.
Types of fraction
 Mixed Numbers
 A number which consists of a whole number and a
 proper fraction is called a mixed number.
Mixed Numbers

Suppose that we have two whole pizzas and

of a pizza. We can write that we have
Writing an Improper Fraction as a
Mixed Number
 1. Divide the numerator by the denominator.
 2. Write the quotient as a whole number, and the
 remainder (if it exists) as the numerator of the fraction
 part of the mixed number. The denominator remains
 the same. So we write
Example:
Writing a Mixed Number as an
Improper Fraction
 1. Multiply the whole number by the denominator of
  the fraction.
 2. Add this product to the numerator.
 3. Write the sum as the numerator of the improper
  fraction over the denominator of the fraction.
Example:
Equivalent Fractions
 Fractions which have the same value are called
 equivalent fractions.
Example:
 Determine whether they are equivalent.
Enlarging a Fraction
 The value of a fraction does not change when its
 numerator and denominator are both multiplied by
 the same non-zero number.
Example:
 Find three equivalent fractions for each fraction.
Simplifying and Reducing a Fraction
 1. Find the prime factors of the numerator and the
  denominator.
 2. Divide the numerator and the denominator by the
  common prime factors.
 3. The result after division is the reduced fraction.
Example:
 Reduce each fraction to its lowest terms.

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Fractions

  • 1.
  • 2. Understanding Fractions  In mathematics, the word ‘fraction’ represents a part that is broken off from a whole. A broken whole may be a part of a cake, a part of a stick, or a part of a group, etc. A fraction is a part of a whole thing or a part of a group of things.
  • 3. For example, the pizza on the left is a whole. There is one pizza, and it is cut into five equal slices, or parts. When we say, ‘ of the pizza has been eaten,’ we mean that two of the five equal slices of the pizza have been eaten.
  • 4.
  • 5. Examples:  Write each shaded area as a fraction.
  • 6. Terms of a Fraction  A fraction consists of two numerals with a horizontal bar between them. The horizontal bar is called the fraction bar.  The number above the fraction bar is called the numerator and the the number below the fraction bar is called the denominator. The numerator and the denominator are called the terms of the fraction.
  • 7.
  • 10. Examples: Write a fraction to describe each situation. a. There are fifteen boys and thirteen girls in a class. Which part of the class are girls? b. Five out of the eleven players on a football team have a yellow card. c. A box of compact discs contains three Maths CDs, four Physics CDs, five Chemistry CDs, four audio CDs, and five video CDs. How many of the CDs are related to school subjects?
  • 11. Types of fraction  Proper (Simple) Fractions  If the numerator of a fraction is smaller than its denominator, it is called a proper (or simple) fraction.
  • 13. Types of fraction  Improper Fractions  If the numerator of a fraction is greater than or equal to its denominator, it is called an improper fraction.
  • 14. Types of fraction  Mixed Numbers  A number which consists of a whole number and a proper fraction is called a mixed number.
  • 15. Mixed Numbers Suppose that we have two whole pizzas and of a pizza. We can write that we have
  • 16. Writing an Improper Fraction as a Mixed Number  1. Divide the numerator by the denominator.  2. Write the quotient as a whole number, and the remainder (if it exists) as the numerator of the fraction part of the mixed number. The denominator remains the same. So we write
  • 18. Writing a Mixed Number as an Improper Fraction  1. Multiply the whole number by the denominator of the fraction.  2. Add this product to the numerator.  3. Write the sum as the numerator of the improper fraction over the denominator of the fraction.
  • 20. Equivalent Fractions  Fractions which have the same value are called equivalent fractions.
  • 21. Example:  Determine whether they are equivalent.
  • 22. Enlarging a Fraction  The value of a fraction does not change when its numerator and denominator are both multiplied by the same non-zero number.
  • 23. Example:  Find three equivalent fractions for each fraction.
  • 24. Simplifying and Reducing a Fraction  1. Find the prime factors of the numerator and the denominator.  2. Divide the numerator and the denominator by the common prime factors.  3. The result after division is the reduced fraction.
  • 25. Example:  Reduce each fraction to its lowest terms.