1. Warm-up
Solve each equation
4+13=
−3+7=
4−13=
−3−7=

2. Integer Review

3. Adding Rule #1 When adding numbers with the same sign:
Add the numbers.
Keep the sign.

4. Adding Rules Pos + Pos = Pos EX: 5+5 = 10 Neg + Neg = Neg

5. Adding Rule #2 (Neg + Pos or Pos + Neg)
When adding numbers with different signs:
Subtract the smaller number from the larger number.
Look for the highest absolute value and keep that sign.
Note: Absolute value is the distance a number is from zero on a number line.

6. Examples = = =

7. Subtraction Rules Changing Subtraction to Addition
When there is only one ‘-’, change it to ‘+ -’ first.
When 2 ‘-’ signs are next to each other change them to a ‘+’ first.
Then use our adding rules!

8. Examples = =
-20 – (-30) - 5 =
8 – 15

9. Multiplication and Division Rules
First ignore the signs and do the work!
Then…
When the signs are the same the answer is +
When the signs are different the answer is -

10. Examples
-2∙-5 =
20/-4 =
-2∙5 =
-20/-4 =