1. Review of Integers and Solving Equations
E-day
Review of Integers
and Solving Equations

2. Same Signs- Adding Add the absolute values and use the common sign
5+ 6= Positive + Positive = Positive
-5 + (-6) = -11 Negative + Negative = Negative
-2 + (-4) = 2) = 3) (-16) =

3. Different Signs-Adding
SUBTRACT their absolute values
The sum is:
Positive if the positive integer’s absolute value is
greater (more positives)
Negative if the negative integer’s absolute value
is greater (more negatives)
Examples :
4) 12 + (-6) = 5) 5 + (-8) = 6) = 7) =

4. Subtracting Integers ADD THE OPPOSITE
Step 1: Change the subtraction sign to addition Step 2: Change the second number to its
opposite. ( pos. to neg. or neg. to pos.)
Step 3: Follow addition rules
Same sign = Add
Different sign = Subtract
Ex: 2 – 6 – (-4) = 2 + (-6) + 4 = 0

5. Multiplying and Dividing Integers
Same Sign- the product of two integers with the same sign is POSITIVE.
Different Sign- the product of two integers with different signs is NEGATIVE.
Zero- the product of an integer and 0 is 0.

6. Solving Equations Show All Work Write the original equation
Use properties of equality
Solve addition equations using subtraction
Solve subtraction equations using addition
Solve multiplication equations using division
Solve division equations using multiplication
3. Write solution
4. Check your solution
x + 5 = 12
x = 7
7 + 5 = 12

7. Solving 2-step Equations
Equations have two different operations
Write the Equation
Then, undo addition or subtraction
Next, undo multiplication or division
Write the solution
Check your solution
2x + 6 = x = 8 ÷2 ÷2 x = 4 √ 2(4) + 6 = 14