Adding, Subtracting, Multiplying, and Dividing Integers

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Presentation transcript:

Adding, Subtracting, Multiplying, and Dividing Integers Integer Rules Review Adding, Subtracting, Multiplying, and Dividing Integers

Vocabulary Integer- whole numbers and their opposites Absolute value- A number’s distance from zero on a number line Additive Inverse- The opposite of any number, x, is –x, and their sum is zero

Same sign- add and keep that sign Adding Integers Rule: Same sign- add and keep that sign -7 + -2 = -9 Different signs- subtract and take the sign of the number with the greater absolute value -8 + 3 = -5 7 + -4 = 3

Subtracting Integers SAME-CHANGE-OPPOSITE Rule- Keep the first integer the same, change the subtraction to addition, change the second integer to its opposite. *Then use the addition rules!!

You try: -9 – 4 = 3 – (-2) = -5 - -(5) =

Multiplying and Dividing Integers The rules are the same for both: Same sign : positive answer Different signs: negative answer If more than two integers only apply rule to two integers at a time.

You try: -7 x -8 = -21 ÷ 7 = 9 x -4 = 32 ÷ -8 =