2. INTEGERS Mr. Yanniotis

3. DO NOW

4. +$90 -$1.24 -3.4 -21 + 1/2 53 +4 -50% 0

6. INTEGERS  Integers are whole numbers that describe opposite ideas in mathematics.  Integers can either be negative(- ), positive(+) or zero.  The integer zero is neutral. It is neither positive nor negative, but is an integer.  Integers can be represented on a number line, which can help us understand the valve of the integer.

7. POSITIVE INTEGERS  Are to the right of zero  Are valued greater than zero.  Express ideas of up, a gain or a profit.  The sign for a positive integer is (+), however the sign is not always needed.  Meaning +3 is the same value as 3.

8. NEGATIVE INTEGERS  Are to the left of zero  Are valued less than zero.  Express ideas of down or a lose.  The sign for a negative integer is (-). This sign is always needed.

9. Negative integers are valued less than zero, and are always to the left of zero. Zero is neither positive or negative Positive integers are valued more than zero, and are always to the right of zero.

14. The “net worth” of opposite integers is zero.

15. OPPOSITE INTEGERS OOpposite integers always have a “net worth” of 0. This is called the ZERO PRINCIPAL. OOpposite integer have the same “absolute value”, meaning the distance from the points on a number line to zero is the same. TThis can be referred to as the integers magnitude.

16. MOVEMENT ON A NUMBER LINE MAGNITUDE AND DIRECTION  Every integer represents a magnitude and a direction.  The integer +3 describes a movement of 3 units in a positive direction.(right)  The sign (+) tells you the direction.  The number (3) indicates how far to move or the MAGNIUDE( a move- ment of 3 units) + 3 Directio n Magnitud e

18. "6" is 6 away from zero, and " − 6" is also 6 away from zero. So the absolute value of 6 is 6, and the absolute value of − 6 is also 6 Absolute Value means...... how far a number is from zero: ABSOLUTE VALUE

19. ABSOLUTE VALUE SYMBO To show you want the absolute value of something, you put "|" marks either side (called "bars"), like these examples: |-8|=8|5|=5 Note: Absolute value of zero is zero

20. PRACATICE SITES All work must be shown and will be collected for portfolios. Please show Mr. Y your scores before moving on. http://www.aaamath.com/g83a_ax1.htm http://www.aaamath.com/g83b_cx1.htm http://www.softschools.com/quizzes/math/integers/quiz3232.html http://www.softschools.com/math/integers/integer_number_line/