Transcript One Step Equations Review

One Step Equations and
Inequalities Review

Remember: Addition and subtraction are
inverse operations and multiplication and
division are inverse operations!!!

What does that mean???
 When
 When
 When
 When
given
given
given
given
Review
a multiplication problem divide
a division problem multiply
an addition problem subtract
a subtraction problem add

So………
◦ What is my inverse operation for
multiplication?
◦ What is my inverse operation for division?
◦ What is my inverse operation for
subtraction?
◦ What is my inverse operation for addition?
Review

Which operation are the following
problems using???
◦ 5m = 98
◦ k = -19
8
◦ 9 – t = 64
◦ j + 4 = -14
Review

Decide the inverse operation you will use
to solve for each variable:
◦ 8x = 87
◦ 9 + m = -17
◦ m = -68
8
◦ k – 6 = -3
Review
 Remember…….
 *****When
you are using the
inverse operations to solve for a
variable what you do to one side
you MUST do to the other!!!!!!
Review

Inequality Reminders:
◦ Fewer than, below means less than: <
◦ More than, above means greater than:
>
◦ At most, no more than means less than
or equal to: ≤
◦ At least, no less than means greater
than or equal to: ≥
Review

Graphing Inequality Reminders:
◦ < , > means you use an OPEN circle
◦ ≤ , ≥ means you use a CLOSED circle
◦ x > -5 Open or closed???
◦ y ≥ 8 Open or closed???
Review

Last inequality reminder…
◦ > or ≥ : shade to the RIGHT on the graph
◦ < or ≤ : shade to the LEFT on the graph
◦m<7
-1 0
1 2
3
-7 -6
-5
4
5 6
7
8
9
p ≥ -4
-8
Review
-4
-3
-2
-1
0