Positive and Negative Numbers

ADDITION

• If both numbers are + add and the number is + .

• If both numbers are - add and the answer is - .

• If one is + and one is - get the difference between the two numbers (subtract) and the answer is the sign of the larger number.

• If you have more than two numbers: add all the positives together, add all the negatives together, then add the + answer to the - answer following the rule above.

SUBTRACTION

• Keep the first number the same, change subtraction to addition, change the sign of the second number, then follow the rules for addition of positive and negative numbers.

• If you have more than two numbers: change all the subtraction signs to addition, change all the signs of the numbers after the subtraction signs, then follow rules for addition.

MULTIPLICATION AND DIVISION

• If both numbers are + the answer will be positive.

• If both numbers are - the answer will be positive.

• If one number is + and one is - the answer will be negative.

• If you have more than two numbers in multiplication: multiply all the numbers, if there was an odd number of - signs your answer will be -, if there was an even number of - signs your answer will be positive.