Show:
Variables and Expressions
Order of Operations
Evaluating Expressions
Integers and Absolute Value
Adding Integers
100
What is a variable?
A variable is a letter that stands for a number.
100
What is Order of Operations?
PEMDAS, to avoid confusion, mathematicians have agreed on an order of operations. What order we do addition, subtractions, multiplication, and division in.
100
7b, for b = 5
35
100
What is Absolute Value?
Absolute value are numbers that are the same distance from zero on a number line but in opposite directions are called opposites.
100
-2 + (-2) =
-4
200
What is a numerical expression?
A numerical expression does not have a variable.
200
3 + 6 X 4
27
200
41 - 4h, for h = 10
1
200
What is absolute value?
Absolute value are numbers that are the same distance from zero on a number line.
200
What is |-18| - |7| = ?
11
300
What is a variable expression?
A variable expression is an expression that has numbers and a variable in it.
300
2 X 2 + 0 x 4
4
300
4xy - z, for x = 2, y = 3, and z = 10
14
300
What number is represented by: a loss of 8 yards
-8
300
14 + (-11) =
3
400
16 more than m
m + 16
400
7 + 3 x (8/4)
13
400
2a + 5, for a = 5
15
400
What is |-8| ?
8
400
-3 + 2 + (-7) + 7 + 13 =
12
500
n divided by 3
n/3
500
(56 - 5)/17
3
500
105z, for z = 7
735
500
What is the absolute value of 6?
6
500
-94 + 68 + (-22) + (-13) =
23