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Well I believe you may be referring to the fact that whenever you subtract you actually "add the opposite." Another phrase people may use is to "plus a negative." This is not as accurate as add the opposite. An example would 12-5. It can be written as 12 + -5. You are simply adding the opposite of positive 5 which is negative 5. Now this may seem silly, but where it is useful is when you have a lot of negatives. For example. -10- -5. For some this is confusing until we add the opposite. I can rewrite this as -10 + 5. I simply took the opposite of -5 which was positive 5 and added it to -10. This equals -5. Hope this helps.
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How do you Use braces and digits to designate the set of integers?
-1,-2,-3
Why do we use Z and Q to represent integers?
We use Q for Rationals... which is repreentative of Quocentia (Quotient), since rationals are RATIOs or fractions.
How can you use algebra tiles to simplify an algebraic expression?
you can add your integers as addition and round them to simplest form.
Is the number 81 irrational?
No - because it can be represented as a ratio of integers : 81 = 81/1 Any number that can be represented as a ratio of 2 integers is classified as a rational number (other than that you can't use 0 for the denominator)
What symbol correctly compares two fractions?
You can use the same symbols that you use to compare integers or decimals: equal, greater than, greater-than-or-equal, etc.
