Easy Algebra Step-by-Step

(Marvins-Underground-K-12) #1

30 Easy Algebra Step-by-Step


Step 2. The signs are opposites (one negative and one positive), so make the
quotient negative.

=−

120


3


40


c.^120
− 3
Step 1. Divide 120 by 3.
120
3

= 40


Step 2. The signs are opposites (one positive and one negative), so make the
quotient negative.
120
3

40



=−


d. −^120
0
Step 1. The divisor (denominator) is 0, so the quotient is undefi ned.

=

120


0


undefi ned

e.^0
30
Step 1. The dividend (numerator) is 0, so the quotient is 0.
0
30

= 0


To be successful in algebra, you must memorize the rules for adding,
subtracting, multiplying, and dividing signed numbers. Of course, when you
do a computation, you don’t have to write out all the steps. For instance, you
can mentally ignore the signs to obtain the absolute values, do the necessary
computation or computations, and then make sure your result has the cor-
rect sign.
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