1300_section1o2_after

# 1300_section1o2_after - absolute value Subtracting Integers...

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1 MATH 1300 - Section: 13549 Instructor: Dr. Almus www.math.uh.edu/~almus E-mail: [email protected] Announcements: Read my website carefully. I assume that all my students read the syllabus for this class. Print out the class notes and bring them to our class (see the calendar for the section that will be covered) Please do not use cell phones or laptops during the lectures. If you email me, please include your name and your class. 1) Get a CASA account at www.casa.uh.edu . 2) Take the course policy quiz ASAP. 3) Check the Homework link on my website for the due dates.

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2 1.2 Integers Absolute Value : The absolute value of a real number is its distance from 0 on the number line. The numbers 2 and -2 are both 2 units away from 0. That is, 2 2 = and 2 2 = - . The absolute value of a real number is never negative! Examples: = 5 = - 5 = 2 . 1 = - 5 . 2 = 0
3 Operations with integers: Adding Integers: o Same signs – add and keep the sign o Different signs – subtract their absolute values and take the sign of the number with the larger

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Unformatted text preview: absolute value Subtracting Integers: o Change the problem to addition using these rules: b a b a b a b a b a b a b a b a +-=----+-=--+ =---+ =-) ( ) ( ) ( ) ( o Use the rules for adding integers (above) Examples: Perform the following operations: 1. 8 + (-3) 2. 6 + (-6) 3. -4 + (-6) 4. 14 – 75 + 17 5. -17 + (-25) 6. 28 + 44 7. 6 – (-10) 8. -7 – 4 9. -8 – (-3) 10. -79 – 114 11. -197 – 216 12. -22 – (-18) + 4 4 Multiplying and Dividing Integers: o Multiply or divide “normally” o If multiplying/dividing two numbers – same signs means positive answer, different signs means negative answer o For more than two numbers – even number of negative signs means the answer is positive, odd number of negative signs means a negative answer Examples: Perform the following operations: 1. -8(2) 2. 15(-8) 3. -12(-10) 4. (-14)(-27)(0) 5. 25(12) 6. 97(-3) 7. 4(-4)(-5) 8. -2(-3)(-4)(-5) 9. -36 ÷ 6 10. -63 ÷ (-9) 11. 0 ÷ 5 12. -72 ÷ 9...
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## This note was uploaded on 02/21/2012 for the course MATH 1300 taught by Professor Staff during the Spring '08 term at University of Houston.

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1300_section1o2_after - absolute value Subtracting Integers...

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