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SAI International School


                                               Class :  VII


           Mathematics


           Chapter - 9 – Rational Number


           Lesson Note – 9.4


           Subtopics:

                        Multiplication
                        Division


               3.  Multiplication

                        Multiplication of a Rational Number with a Positive Integer.

           To multiply a rational number with a positive integer we simply multiply the integer with the numerator
           and the denominator remains the same.
           Example:





                        Multiply of a Rational Number with a Negative Integer


           To multiply a rational number with a negative integer we simply multiply the integer with the numerator
           and the denominator remains the same and the resultant rational number will be a negative rational
           number.
           Example:





                        Multiply of a Rational Number with another Rational Number
           To multiply a rational number with another rational number we have to multiply the numerator of two
           rational numbers and multiply the denominator of the two rational numbers.






                              3      5
           Example : Multiply    and  .
                              7     11
           Solution:
   1   2   3