1. OPERATIONS WITH INTEGERS: ADD, SUBTRACT, MULTIPLY & DIVIDE

2. WE CAN SEE, THREE TYPES OF NUMBERS HERE, OR INTEGERS: NEGATIVE NUMBERS, ZERO, AND POSITIVE NUMBERS. THE NEGATIVE NUMBERS ARE TO THE LEFT OF ZERO, SO THEY ARE LESS THAN ZERO. THE POSITIVE NUMBERS ARE TO THE RIGHT OF ZERO, SO THEY ARE GREATER THAN ZERO. ZERO, THE DIVIDING POINT, IS NEITHER POSITIVE NOR NEGATIVE. FOR THE NUMBER LINE ABOVE, "1" CORRESPONDS OR IS RELATED TO THE RED POINT, "2" IS RELATED TO THE GREEN POINT, "3" IS RELATED TO THE BLUE POINT, AND SO FORTH. WHEN WE MOVE TO THE RIGHT ON THE NUMBER LINE, WE INCREASE IN NUMBERS. WE DEFINED THIS AS ADDITION. WHEN WE MOVE TO THE LEFT, WE DECREASE. AND WE DEFINED THIS AS SUBTRACTION. THIS IS GENERALLY THE WAY A NUMBER LINE WORKS. 0 2 1 4 3 5 -2 -4 -3 -5

3. +++ When we add two positive numbers or multiply two positive numbers, we get a positive number. However, we can subtract a positive number from a positive number and suddenly, we don't get a positive number! For example, if we subtract 5 from 2, we would start at 2 on the number line and move left 5 places. That brings us to -3. 5 + (-2) = -3 Take a look at below to see the sign rules for integers. -- ++ --- + - 5 + (+2) = 5 + 2 = 7 (5) - (-2) = 5 + 2 = 7 (2) + (-5) = 2 - 5 = -3 (2) - (+5) = 2 - 5 = -3