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6.2 Solving Inequalities Using Multiplication and Division

Author: Colin S

Table

Equation	Added to Both Sides	New Equation	True or False
10 > 8	+3	13 > 11	True
10 > 8	-7	3 > 1	True
10 > 8	* 2	20 > 16	True
4 < 6	/4	1 < 1½	True
4 < 6	*-3	-12 < -18	False
4 < 6	/-6	-2/3 < -1	False

Source: Mr. Hennen

Rule

When multiplying or dividing by a negative number, you must reverse the inequality symbol.

Source: Mr. Hennen

Problem Solving

Games

Source: http://www.math-play.com/Inequality-Game.html and http://education.jlab.org/sminequality/index.html