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How do you subtract integers with opposite sign?
You actually end up adding. Since a negative number is less than zero, subtrating negative numbers is really adding positive numbers. An example: 9 - (-7) = 9 + 7 =16.
If you subtract a positive from a negative what do you get?
A negative, since subtracting a positive is equivalent to moving left done the number line. Since we start left of 0 on the number line, it is only possible to end left of it after subtraction, resulting in a negative. Since the subtraction is the opposite of addition, to subtract a positive really means that you are adding a negative. So you are adding two negatives which gives you a negative sum.
What does a negative plus a negative means?
It's just a word-description of the process of adding two negative numbers. It's really easy to do. Just add the two numbers and write the answer with a negative sign.
Are there any square roots of negative numbers?
imaginary numbers. but no, not really.
Why is it that you can subtract a negative number and add a positive number?
It means that you really increase the number that you were subtracting from, because you are adding to it the opposite of the number that is subtracted. Think about your bank account. Let's say you withdrew $50 more than the amount of money that you had in your checking account. The bank statement will show a negative account of yours as - 50. If you deposit $30, then you can add 30 (which is the opposite of -30) to -50 to calculate your balance, or you can subtract -30 from -50, because from those "negative" money you took of some of them. So that, -50 - (-30) = -50 + 30 = -20 (your balance). Now, deposit $20 dollars more to subtract that -20 from your statement.
