Take your homework out!

1. Take your homework out! • Workbook pg. 174 & 176 • If you were testing and missed the notes, come see me. You are still responsible to make up the classwork and homework and bring back next class. • Thanks!

2. Adding and SubtractingIntegersLearning Goal: I will be able to add and subtract positive and negative integers.

3. Graph the following set of Integers… • { 3, 0, -2 } <---|---|---|---|---|---|---|---|---|---> 5 4 3 1 2 -2 -3 -1 0 2. Name the set of integers graphed. <---|---|---|---|---|---|---|---|---|---> 5 4 3 1 2 -2 -3 -1 0 { -3, -1, 2, 5 }

4. State the rule for adding integers If the signs in front of the numbers are the same, add the numbers and keep the signs. If the signs in front of the numbers are different, subtract the numbers and keep the sign of the larger number.

5. FIRST FIX YOUR DOUBLE SIGNS 3. 20 + (-5) 20 – 5 WHAT’S THE RULE? DO I ADD OR SUBTRACT? 15 FIRST FIX YOUR DOUBLE SIGNS 4. (-2) + (-17) -2 – 17 READ THIS AS NEGATIVE 2 AND NEGATIVE 17 WHAT’S THE RULE? DO I ADD OR SUBTRACT? -19

6. FIRST FIX YOUR DOUBLE SIGNS 5. (-7) + 5 + (-2) READ THIS AS NEGATIVE 7 AND POSITIVE 5 -7 + 5 - 2 - 2 WHAT’S THE RULE? DO I ADD OR SUBTRACT? - 2 READ THIS AS NEGATIVE 2 AND NEGATIVE 2 - 4 WHAT’S THE RULE? DO I ADD OR SUBTRACT?

7. Subtracting Integers What’s the rule???? Change the subtraction sign to a plus sign, then change the sign of the number after it. Remember this? Keep-Change-Change OR you can just “fix” your double signs and follow the adding rules!!!!

8. FIRST FIX YOUR DOUBLE SIGNS 6. -9 – (-11) READ THIS AS NEGATIVE 9 AND POSITIVE 11 -9 + 11 2 WHAT’S THE RULE? DO I ADD OR SUBTRACT? NO DOUBLE SIGNS THIS TIME READ THIS AS POSITIVE 6 AND NEGATIVE 11 7. 6 – 11 -5 WHAT’S THE RULE? DO I ADD OR SUBTRACT?

9. READ THIS AS NEGATIVE 34 AND NEGATIVE 20 8. -34 – 20 -54 WHAT’S THE RULE? DO I ADD OR SUBTRACT?

10. 9. The temperature in Cleveland, Ohio was -20 C at 6 am. By noon that day the temperature had risen 19 C. By 6pm, the temperature had fallen 13 C. What was the temperature at 6pm? -13 -20 +19 -1 -13 -14

11. 10. Nicole has $151 in her checking account. She writes a check for $117, makes a deposit of $49, then writes a check for $81. find the amount left in her account. - 81 + 151 - 117 + 49 34 - 81 + 49 83 - 81 2

12. 11. The highest location in a certain foreign country is 15,586 feet above sea level. The lowest point in the same country is 239 feet below sea level. REMEMBER FIX YOUR DOUBLE SIGNS a) Find the difference in the two elevations. + 239 + 15,586 b) A city is at 6,886 feet above sea level. Is this closer to the highest point or the lowest point? 15,586 + -239 15,325 6,886 - -239 15,586 - 6,886 7,125 8,700

13. 12. The highest location in a certain foreign country is 15,802 feet above sea level. The lowest point in the same country is 227 feet below sea level. REMEMBER FIX YOUR DOUBLE SIGNS a) Find the difference in the two elevations. - 227 + 15,802 b) A city is at 9,161 feet above sea level. Is this closer to the highest point or the lowest point? 15,802 + 227 16,029 9,161 - -227 15,802 - 9,161 9,388 6,641

14. Classwork & Homework • Textbook pg.630 #1-26 evens pg.638 #1-27 odds – We will do next class. • Homework: Workbook pg. 178 odds, pg. 180 evens • Cognitive Tutor: Unit 30 due 5/3/13 *If you finish ALL units by 5/15 you do not have to take a Final Exam.