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Writing Algebraic Expressions
Evaluating Expressions
Translating Words to Symbols
Order of Operations
100
8 more than a number
n + 8
100
Evaluate for x = 5:

2x
2(5) = 10
100
sum
+
100
-4(7)
-28
200
twelve less than a number
n - 12
200
Evaluate for x = 3 and y = -2:

4x + 3y
4(3) + 3(-2) = 6
200
product
∙
200
-8 - 4
-12
300
2 more than the quotient of a number and 4
n ÷ 4 + 2
300
Evaluate for x = 4 and y = -3 and z = -5:

5(xy - z)
5[4(-3) -(-5)] = -35
300
difference
-
300
5 + 3(4 - 7) - 15
-19
400
the number of weeks in y years
52y
400
Evaluate for x = 3 and y = -2 and z = -5:

2x2y + 3z
2(3)2(-2) + 3(-5) = -51
400
quotient
÷
500
the number of minutes in s seconds
s ÷ 60
500
Evaluate for x = -4 and y = -2 and z = -6:

-x2 + 3y - 2z
-(-4)2 + 3(-2) - 2(-6) = -10
500
is
=
500
Write an expression for the situation described below. Then solve.

At track practice, Melanie ran 3 3/5 miles and Rebecca ran 4 2/3 miles. How much farther did Rebecca run than Melanie?
4 2/3 - 3 3/5 = 1 1/15 miles