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Rules in operation with signed numbers?
I. Addition 1. Positive + Positive = Positive ( +3 PLUS +3 = +6) 2. Negative + Negative = Negative (-3 PLUS -3 = -6) 3. Positive + Negative OR Negative + Positive Subtract the numbers then copy the sign of the number with greater value. (+5 PLUS -3 = +2) (-5 PLUS +3 = -2) II. Subtraction Change the sign of the subtrahend then the follow the rules of addition above. Examples: +5 MINUS -3 = +5 +3 = +8 +5 MINUS +3 = +5 -3 = +2 III. Multiplication 1. Positive x Positive = Positive (+3 times +5= +15) 2. Negative x Negative = Positive (-3 times -5 = +15) 3. Positive x Negative = Negative (+3 times -5 = -15) 4. Negative x Positive = Negative (-3 times +5 = -15) IV. Division Same rules as in multiplication Note: Like signs when multiplied or divided together = Positive Unlike signs when multiplied or divided together = Negative
Does a positive plus a negative equal a negative?
Not necessarily. 5 + (-6) = -1, a negative 5 + (-5) = 0 or 5 + (-4) = 1, a positive.
Why is the sum of a positive integer and a negative integer is always negative?
It isn't always negative. ... for example: -5 + 12 = 7 (a positive number) -5 + 2 = -3 (a negative number) -5 + 5 = 0 (neither negative nor positive) If the negative number has greater magnitude than the positive number, the sum will be negative If the positive number has greater magnitude than the negative number, the sum will be positive If the negative and positive numbers have the same magnitude, the sum will be zero.
What is the answer to negative fifteen divided by positive three?
Negative 5. It's normal division, except you need to remember these rules: Positive & Negative = Negative Positive & Positive = Positive
Does a positive plus negative equal a negative?
If the positive number is greater than the negative, it's a positive. Ex: 8 + (-3) = 5 If the negative is greater though, then the answer is a negative. Ex: 3 + (-5) = -2
