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Suppose x and y are two rational number.Then x = p/q and y = r/s where p, q, r and s are integers, with q and s being non-zero.
Then x - y = p/q - r/s = pq/qs - qr/qs = (pq - rs)/qs.
The signs of x and y do not matter, in so far as their signs will be used to determine the signs of p,q, r and s.
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IF you are adding two rational numbers with different signs?
Then you are adding two rational numbers with different signs! No big deal!
How do you add numbers with different signs?
You add all the numbers with + signs and subtract all that have minus signs.
What happens if you subtract a positive and a negative numbers?
In addition different signs you subtract and give the sign of the bigger number. Ex: 6+(-8)= -14
How do you add or subtract integers with a different sign?
Adding two numbers with different signs means subtracting the two absolute integers (without sign) and vice versa.
What is the rule for dividing rational numbers with different signs?
The numerical value is the same as the quotient of the two positive equivalents but the sign is always negative.
