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★Fractions Paper 1
Monday, 4 February 2013 // 0 narnian

FRACTIONS (PROPER FRACTIONS, THE ADDITION & SUBTRACTION)

TIPS

  1. 1/2 = one over two or one half
  2. 1/4 = one over four or one quarter
  3. 3/4 = three over four or three quarters
  4. Fraction with the numerator that is less than its denominator is called proper fraction.
  5. Improper fraction is a fraction with numerator that is same as or greater than its denominator.
    For example,

    We write the improper fraction as 3/2.
    We read it as three halves or three over two.


COMMON MISTAKES

Error in counting the total number of equal parts (denominator) in a given diagram.
Example:

  1. What fraction of the given diagram is shaded?

    Incorrect: 3/4
    correct:3/8

FRACTIONS (MULTIPLICATION & DIVISION OF FRACTIONS, BODMAS)

TIPS

  1. To multiply any proper fractions by a whole number, we can use the following methods:
    1. Use diagrams
      Example:
      1/2 of 4
      = 1/2 x 4
      = 2

    2. Multiply the whole number by the numerator
      Example:

    3. Cancellation
      Example:


COMMON MISTAKES

Error in multiplication.
Example:
  1. 1 2/3 x 24 =
    Incorrect:   1 2/3 x 24
     =   5/3 x 24
     =   120/72
     =   1 2/3

    Correct: