Simplifying+expressions+by+dividing+and+multiplying


 * 1. How to simplify expressions by multiplying**
 * You need to multiply the numbers that are in the expression e.g. 7 x 6n = 7 x 6 x n = 42 x n = 42n
 * Don't forget about the rules with multiplying negatives and positves: two negatives or positives multiplied = a positive number; but, a negative x a positive = negative number
 * e.g. 5 x -2n = 5 x -2 x n = -10 x n = -10n
 * e.g. -3 x -4b = -3 x -4 x b = 12 x b = 12b

**2. How to simplify expressions by dividing or by cancelling** > =m 3 /m 2 = > m x m x m / m x m = m (2 M's of the numnerator cancel out 2 M's of the denominator because we have divided them both by m)
 * To cancel, we have to divide both the numerator and the denominator by a common factor (preferably the lowest)
 * Warning! In Algebra expressions you may just have letters, but it can still be cancelled
 * e.g. m 3 divided by m 2
 * Other examples:
 * 12x/8 = 3x/2 (both divided by 4)
 * 9n/12n = 9 x n x n x n/ 12 x n = 3x 2 /4 (numbers divided by 3 and then by n)


 * 3. Complete the following exercises in your books **
 * Review from page 181
 * Questions from the Year 8 book - complete as many of the tasks outlined below in 20 minutes as you can
 * Question 1: choose 4 questions to complete each taken from a different row
 * Questions 2 & 3: Choose one to do from each
 * Question 4-6: Complete 4 questions from each, included at least one *starred* questions
 * Complete all of Questions 7 & 8