1
Sec. 5.3Add and Subtract Signed Decimal
Numbers
Adding and Subtracting Decimal Numbers
Step 1 Write the numbers in columns with the
decimal points lined up.
Step 2 If necessary, write in zeros so both
numbers have the same number of decimal
places. Then

1
Sec. 5.4Multiplying Signed Decimal Numbers
Multiplying Two Decimal Numbers
Step 1 Multiply the numbers (the
factors) as if they were whole
numbers.
Step 2 Find the total number of decimal
places in both factors.
2
Step 3 Write the decimal point in the
a

1
Sec. 2.3Solving Equations Using Addition
Ex. 1 Which of these numbers, 70, 40,
or 60, is the solution of the equation
c 10 50?
2
You Try It!
1. a) Which of these numbers, 95, 65, or
70, is the solution of the equation
c 15 80?
b) Which of these numbers,

1
Sec. 10.4 Adding and Subtracting Polynomials
Like Terms
Like terms are terms with exactly the
same variables, and with the same
exponents on the variables. Like terms
may be combined.
2
Ex. 1 Simplify each expression by
adding like terms.
3
3
6
6
6
6x
9

1
Chapter 2 Review
1. Identify the parts of the below
expression. Choose from these labels:
variable, constant, coefficient.
7 w 6
2
2. The expression for buying hot dogs
for the company picnic is 3a 2c,
where a is the number of adults and c
is the number

1
Sec. 6.2Rates
A ratio compares two measurements with
the same type of units, but a rate
compares two measurements with
different types of units.
Rates are often separated by these words:
in for on per from
2
Ex. 1 Write each rate as a fraction in
lowest

1
Sec. 4.5Mixed Numbers and Estimating
Writing a Mixed Number as an
Improper Fraction
Step 1 Multiply the denominator of the
fraction times the whole number and add
to the numerator of the fraction to the
product.
Step 2 Write the result of step 1 as the

1
Sec. 9.5Introduction to Graphing Linear
Equations
Graphing a Linear Equation
To graph a linear equation, find at least
three ordered pairs that satisfy the
equation. Then plot the ordered pairs on
a coordinate system and connect them
with a straight lin

1
Sec. 7.3The Percent Equation
Ex. 1 Estimate the answer to each
question. (Use front end rounding)
a) What is 25% of $817?
b) Find 25% of 19.7 miles.
c) 25% of 49 days is how long?
2
You Try It!
1. Estimate the answer to each
question.
a) What is 25% of

1
Sec. 3.1Problem Solving: Perimeter
Perimeter
The distance around the outside edges of
any flat shape is called the perimeter of
the shape.
Finding the Perimeter of a Square
Perimeter of a square = side + side + side +
side or
P 4 side or P 4s
2
Ex. 1 Fi

1
Sec. 4.6 Exponents, Order of
Operations, & Complex Fractions
Ex. 3 3 3 and x x x x
2
3
2
Ex. 1 Simplify
3
1
a) b)
2
2
3
4
3
2
3
3
You Try It!
1. Simplify
4
2
1
3
3
a) b)
5
3
2
2 1
c)
3 2
4
Order of Operations
Step 1 Work inside parentheses o

1
Sec. 7.2 The Percent Proportion
Percent is to 100 as part is to whole.
percent
part
100
whole
Similarly, percent is to 100 as amount is to
base.
percent amount
100
base
Write proportion equations like these and
then use cross products to solve.
2
Identi