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Adding Integers (and other numbers)

Adding Integers (and other numbers). Like signs (2 positives or 2 negatives) Just add the numbers (absolute values) Sign of sum remains same Differing Signs (1 positive & 1 negative) 3 Steps Determine Absolute Value of each number Find Difference of Absolute Values

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Adding Integers (and other numbers)

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  1. Adding Integers(and other numbers) • Like signs (2 positives or 2 negatives) • Just add the numbers (absolute values) • Sign of sum remains same • Differing Signs (1 positive & 1 negative) 3 Steps • Determine Absolute Value of each number • Find Difference of Absolute Values • Use the sign of the number that produced the largest Absolute Value

  2. Subtracting Integers(and other numbers) Re-Write the expression . . . . . .as Addition of the Opposite Change Subtraction operation to Addition Change subtrahend to its opposite (number being subtracted, second number) Note: Minuend remains the same (number being subtracted from, first number) Apply the rules for Addition

  3. - + 0 Is the opposite of Adding a positive number Add (-) Add (+) Subtract (+) Subtract (-) Is the opposite of Subtracting a positive number Another way to "picture" it . . . which way to move on a number line? Using a number line to think through adding & subtracting positive or negative numbers Operation (sign of 2nd number)

  4. Multiplying & Dividing Integers(and other numbers) • Like signs (2 positives or 2 negatives) • Product or Quotient is Positive (+) (+) * (+) = (+) and (-) *(-) = (+) • Differing Signs (1 positive & 1 negative) • Product or Quotient is Negative (-) (+) * (-) = (-) and (-) *(+) = (-)

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