Cornell Notes 1 A Multiplying and Dividing Integers

Cornell Notes #1 A Multiplying and Dividing Integers

Review: Adding and Subtracting Integers • Integers 1, -2, ½ , ¾, - ½ – Adding • same sign -1 + -2 = -3 – Add – Keep sign • Different signs – Subtract – Take sign of » Larger # 1 + -2 = -1

Review: Adding and Subtracting Integers • Integers – Subtracting • SCC the signs – Now the signs » Same – Subtracting • SCC the signs 1, -2, ½ , ¾, - ½ -3 - +3=-6 -3 + -3 = add and keep the sign (3 +3) and – sign = -6 - 5 - -4= -1 -5 + +4= -1 – Now the signs » Different subtract (5 -4) and take the sign of the larger number (-5), so -1

Review: Multiplying Integers • Cover – 2 signs you’re using » + and – Sign left uncovered » is the sign of the answer Example: 5 (-3)=-15

Review: Dividing Integers • Cover – 2 signs you’re using » - and – Sign left uncovered » is the sign of the answer • Same as multiplication Example: -15 ÷ -3=5

Guided Practice 1. -6 -6= a. Notes: Subtraction a. b. 2. -6+6= SCC -6 + -6 Signs same a. Add, keep sign a. Notes: Adding a. 3. -6 ÷ -2= Signs different a. Subtract, take sign of larger number a. Use “Multiply/Division Man” b. Cover what you have – and – c. Sign of answer is sign that is still uncovered

USE YOUR NOTES to solve these equations (5 minutes) show work 1. 2. 3. 4. 5. 6. 7. 8. 9. +12 +-12= -12 - - 12= +12 -12 + -12= -12 - +12= -12 + +12= -2 (-3)= 6 ÷ -3= 2 (-2)=