#### Answer

Rationalising

#### Work Step by Step

Look at the definition of rationalizing denominators and numerators on page 22. For example : The method by which a fraction is rewritten without changing the value, so that the denominator contains only rational numbers is referred to as rationalizing the denominator. The method by which a fraction is rewritten without changing the value, so that the numerator contains only rational numbers is referred to as rationalizing the numerator.