What are some fraction tips and methods(dividing and multiplying fractions)?
  Reciprocal numbers are taught by looking at measurement divisions with a dividend of 1 (eg 1 divided by 3/4). Then the procedure is generalized to any fractional dividend, so that we arrive at the common shortcut for division of fractions (the shortcut of flip and multiply). These steps effectively justify the rule for dividing fractions to the students.