Math- Rules with Integers, Multiplying, Adding, Subtracting, and Dividing

Integers are numbers on a number line, as you may know. They can be positive or negative. Even though it is not common core, you can use this to help with surprise questions on the test.

Adding Integers

For problems that keep the same operation sign, add and keep the same signs. Remember: When adding negative integers, you can put the minus sign first so you don't forget it.
For problems that have different operation signs, subtract the numbers as if they were both positive, then use the sign of the number farther from zero.

Subtracting Integers

When subtracting integers, rewrite and use the addition of integers rules. If you are subtracting a negative integer, the two negatives are replaced by a positive sign because the opposite of negative is positive.

Multiplying Integers

positive × positive= positive
positive × negative= negative
negative × positive= negative
negative × negative= positive

Dividing Integers

positive ÷ positive= positive
positive ÷ negative= negative
negative ÷ positive= negative
negative ÷ negative = positive