Integers+B-1

__**Adding Positive and Negative Integers:**__
by: Bianca and Mr. Rochester

__**Rule #1**__ A positive plus a positive is a positive Examples:
 * 1) 2 + 2 = 4
 * 2) 24 + 10 = 34

__**Rule #2**__ A negative plus a negative equals more negatives. Examples:
 * 1) -2 + -3 = -5 Think of it this way. If you owe some $2 and you borrow $3 from someone else, you now owe $5. You are in debt which is -5.
 * 2) -14 + -15 = -29

__**Rule #3**__ A **positive** number plus a **negative** number can be positive or **negative** depending on the situation.


 * 1) Think of it this way. If you have $5 and borrow $9 you are now in debt. The problem would look like 5 + -9 = -4.
 * 2) If you have $15 and you own someone $10 how much money do you have so spend. The problem would look like 15 + -10 = 5.

edited by: Mr. Rochester

__**Subtracting Positive and Negative Integers:**__
by: Tim and Mr. Rochester

A useful method for subtracting positive integers is to change them to addition problems. In order to do this, you must change the minus sign to a positive and change the sign of the second number.


 * Examples:**
 * 1) 14 - 7 can be rewritten as 14 + (-7) which equals 7. (The 7 was changed to a -7)
 * 2) -14 - 7 can be rewritten as -14 + (-7) which equals -21.
 * 3) 14 - 16 can be rewritten as 14 + (-16) which equals -2.
 * 4) -14 - (-16) can be rewritten as 14 + (+16) which equals 30. ( The -16 was changed to a +16)

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edited by: Mr. Rochester