Expressions
An expression with variables and numbers
algebraic expression?
3a + 5 a= -5
-10
3(-5) + 5
-15 + 5
-10
(56 - 5) / 17
3
(56-5)/17
51/17
3
1
|-4| < | 5 |
5-4
1
Whole numbers and their opposites
What is integers?
Write an expression:
ten less than negative 3
-3 - 10
7b b=6
42
7(6)
42
7 + 4 * 6
31
7+4*6
7 + 24
31
40
-17 -(-23)
17 + 23
40
The way to simplify (PEMDAS)
What is order of operations?
An expression containing only numbers
numerical expression
(9 + y) / x x=2 y=3
6
(9 + (3)) / (2)
12 / 2
6
Use <, >, or =
15*3 - 2 15*(3-2)
>
15*3-2 15*(3-2)
45-2 15*1
43 > 15
- 9 (-8)(-5)
-360
-9(-8)(-5)
72(-5)
-360
Absolute Value
a number's distance from zero on the number line
The product of x and negative five.
-5x
5(y + z) y= 4 z=6
50
5((4) + (6))
5(10)
50
2[8+(5-3)] - 8
12
2[8+(5-3)] -8
2[8 +2] - 8
2[10] - 8
20-8
12
-72/-12
6
Opposites
Numbers that are the same distance from the number line but in opposite directions
Five more than the opposite of y
-y + 5
16 - 4mn m=0 n=3
16
16 - 4(0)(3)
16 - 4(0)
16-0
16
21/7+14*2
31
21/7+14*2
3 +14*2
3 + 28
31
Find the average
10yd, -5yd, 7yd, 9yd, -11yd
2yd
10+7+9+(-5)+(-11)
26 + (-16)
26-16
10/5 = 2
Evaluate
What is replace (substitute/plug-in) each variable with a number?