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Math 010 online work that was due today at the start of class :

Math 010 online work that was due today at the start of class : Gateway Homework #2 (turn in worksheet now, while I take roll) Section 1.4/1.5 Online Homework. Quiz coming up next week:. Gateway Quiz Try #1 8 questions Online quiz with paper worksheet no calculator

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Math 010 online work that was due today at the start of class :

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  1. Math 010 online work that was due today at the start of class: • Gateway Homework #2 (turn in worksheet now, while I take roll) • Section 1.4/1.5 Online Homework

  2. Quiz coming up next week: Gateway Quiz Try #1 • 8 questions • Online quiz with paper worksheet • no calculator • Worth 80 points (only your best score of the semester counts) You have had a number of practice Gateway questions mixed in with your regular homework assignments, but you should also take Practice Gateway Quiz 1before the next class session: • 8 questions on the practice Gateway, same type as on the actual Gateway • You can take the practice Gateway as many times as you want, and only your best score counts for points. (Practice Gateway is worth 8 points) • Additional paper versions of practice Gateways can be picked up in the open lab from any TA or teacher. REMEMBER: Gateway study help available every MTWTh from 8:00 a.m. – 6:30 p.m. in Room 203 JHSW.

  3. Quiz coming up the class session after Gateway Quiz 1on sections 1.2 through 1.8 • 15 questions; 50 minute time limit • Taken in class, but via the online course web site • Worth 60 points • 1 attempt • No calculators allowed Practice Quiz 1should be taken at least 2-3 times before the quiz day: • 15 questions; 50 minute time limit; can take it anywhere • Worth 6 points • Unlimited attempts, only best score counts • Each time you take it, you will get a different set of questions, so the more times you take it, the more chances you’ll have of seeing all the types of questions that might be on the real quiz. • Don’t use a calculator, since you can’t on the real quiz. REMEMBER: Come to the open lab in 203 if you need help. M – Th: 8:00 a.m. – 6:30 p.m.

  4. Any questions on today’s homework? (Sections 1.4/1.5)Reminder: You should be doing this homework without using a calculator, because calculators can’t be used for Quizzes 1 or 2 or the Gateway Quiz.

  5. NOW CLOSE YOUR LAPTOPS

  6. Example Section 1.6 Subtracting real numbers • Substitute the opposite of the number being subtracted • Then add • a – b = a + (-b) Subtract the following numbers. (-5) – 6 – (-3) = (-5) + (-6) + 3 = -8

  7. Answer: 14

  8. Answer: 0

  9. Answer: 11.29

  10. More on subtracting real numbers: Example: “Subtract -5 from 8” Write the 8 FIRST, then subtract -5 FROM the 8. 8 – (-5) = 8 + 5 = 13 Example: “Decrease -8 by 15” This time you start with -8 and then subtract 15. -8 – 15 = -23 Example: -6 – (2 - 11) Do the part in parentheses first : 2 – 11 = -9 Now rewrite the problem as: -6 – (-9) = -6 + 9 = 3

  11. Note: You may find the number line worksheets handed out at the last class session useful for completing these kinds of problems.

  12. Answer: -15

  13. Evaluating algebraic expressions: Example: Evaluate x – y when x = -5 and y = 4 Plug in -5 in place of the x and 4 in place of y: -5 – 4 = -9

  14. Answer: -265 feet

  15. Section 1.7 Multiplying or dividing 2 real numbers with same sign: • Result is a positive number. • Answer is positive if it’s either a positive times a positive or a negative times a negative. Examples:

  16. Answer: 0.42

  17. Multiplying or dividing 2 real numbers with different signs: • Result is a negative number • If multiplying more than two numbers together, count the number of negative signs: if it’s odd, the answer is negative, if it’s even, the answer is positive Examples:

  18. Answer: -12/35

  19. Answer: -84

  20. Answer: 29

  21. Answer: -9

  22. Some more rules for multiplying and dividing: • If b is a real number, 0 · b = b · 0 = 0. • Multiplicative inverses or reciprocals are two numbers whose product is 1. • Quotient of any real number and 0 is undefined. • The quotient of 0 and any nonzero real number = 0.

  23. Answer: -11/8

  24. Answer: 10/7

  25. Answer: -10

  26. Answer: -10/3

  27. Answer: N

  28. Example If a and b are real numbers, and b  0, In other words, never write a final answer with a negative sign on the bottom. Simplify the following.

  29. Today’s homework on 1.6 & 1.7 is due at the start of the next class period.Reminder: You should be doing this homework without using a calculator, because calculators can’t be used for Quizzes 1 or 2, Test 1 or the Gateway Quiz.

  30. You may now OPEN your LAPTOPS and begin working on the homework assignment.

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