Math test tomorrow

Math test tomorrow:
Please study the rules for-
Adding integers:
-the signs are the same- add and keep the sign
-the signs are different-subtract and take the sign of the bigger number

Subtracting integers:
Keep the first number, change the second sign and change the sign of the third number- 

Multiplying Integers:
Multiply, count up the number of negatives- if there is an odd number of negatives the answer is negative, if there is and even number of negatives, the answer is positive.

Dividing Integers:
Divide- count up the number of negatives- if there is an odd number of negatives the answer is negative, if there is and even number of negatives, the answer is positive.