Define absolute value.
The distance from zero on a number line.
What are the order of operations?
PEMDAS
(Parentheses, Exponents, Multiply, Divide, Add, Subtract)
Evaluate
19-x2
When x=-5
-6
Simplify
8y-9y
-y
Add the integers
6+(-4)
2
Evaluate
l-7l
7
Evaluate
7 + 54 + 3(2)
43
Evaluate
n2-3n+8
When n=4
12
Simplify
8a-6+a-1
9a-7
Subtract the integers
-12 - 10
Evaluate
l28l - l-25l
3
Evaluate
20 / 5 x 2
8
Evaluate
4 lm-nl
When m=-7 and n=2
36
Simplify
7x+2y+5-5x+9y-1
2x+11y+4
Add the integers
-12 + (-4) + (-3)
-19
Evaluate
l3-8l
5
Evaluate
4 + 23 x 3
28
Evaluate
s2t - 10
When s=-8 and t=3/4
38
Simplify
-6+3a-b-4a+4b+5
-a+3b-1
Subtract the integers
200 - (-34)
234
Evaluate
l-9 -10l + 122 x 3
451
Evaluate
6 + (12/3)2 - 4 x 2
14
Evaluate
3 lx+yl2 - (xy)2
When x=3 and y=-5
-213
Simplify
6a2b2+3ab2-a2b2-4ab2
5a2b2-ab2
Multiply the integers
-7 (-7)
49