1. Welcome to SCIE 0900 Instructor: Bernadine Cutsor

2. Why do we study science? 1.Need a basic understanding of science 2.Difference between science and technology Science = process to understand and explain the natural world Technology = application of scientific principles 3.Helps us to make informed decisions 4.Using the Scientific Method to approach a problem and find a reasonable solution.

3. The Learning Pyramid Listen Read Audiovisual Demonstration Discussion group Practice by doing Teach others or immediate use Lecture Lecture & Lab Lab Study Sessions Study Sessions

4. Why SCIE 0900? To introduce you to skills that will make you more successful in future science classes Chemistry Biology Physics

5. Review of Math Principles

6. Addition Sum of 2 or more numbers called addends 2 + 4 = 4 + 2

7. Addition of numbers w/different signs 4 + 2 = 6 -4 + (- 2)= -6 -4 + 2 = -2

8. Combine numbers w/same sign 4 + (-5) + (-3) + 7 +(-9) = (-5) + (-3) + (-9) = -17 4 + 7 = 11 Finish the problem: -17+11 = -6 OR 11 + (-17) = -6

9. Subtraction 4 – (-2) = 4 + 2 = 6 4 – (+2) = 4 -2 = 2

10. -4 – (+2) = -4 – 2 = -6 -4 – (-2) = -2 -4 + 2 = -2

11. Multiplying 8 x 4 = 32 (positives) (-6) x (-3) = 18 (negative x negative = positive) (-2) x 4 = -8 negative x positive = negative

12. More than one number (-2) x 5 x (-3) x 4 = (-2 x 5) x (-3) x 4 = (-10) x (-3) x 4 = (-10) x (-12) = 120

13. 4 x 3 x 7 x (-3) = 12 x 7 x (-3) = 12 x (-21) = - 252

14. Dividing Signed Numbers 16 ÷ 2 = 8 (-64) ÷ (-8) = 8 Same signs = positive answer

15. 210 ÷ (-42) = -5 (-77) ÷ 11 = -7 different signs = negative answer

16. Fractions Way of representing the division of a “whole” into “parts” 1 2 A proper fraction has a value less than one The numerator is smaller than the denominator. numerator denominator

17. Properties of Fractions Value of a fraction is not altered if numerator and denominator are multiplied Or divided

18. Adding and Subtracting Fractions Denominator must be the same Usually is the least common denominator (LCD) Change to equivalant fractions EX: ½ + ¼ = 1 2 2 2 24 2 1 2 + 1 3 4 4 X = += =

19. Subtracting 1/3 – ¼ = Determine LCD: 1/3 x 4/4 = 4/12 ¼ x 3/3 = 3/12 Answer: 4/12 - 3/12 = 1/12

20. Multiplying Fractions By a whole number: 2 3 X 6 = 2 X 6 3 X 1 = 12 3 = 4

21. Multiplying Fractions By another fraction: 2 15 2 x 15 30 15 3 16 3 x 16 48 24 X= ==

22. Multiplying fractions with calculator 245.8 24.9 12.8 3.85 675.9 28.4 Enter into calculator 2 ways: 245.8 x 24.9 x 12.8 ÷ 3.85 ÷675.9 ÷28.4 = 1.06 245.8 ÷ 3.85 x 24.9 ÷ 675.9 x 12.8 ÷ 28.4 = 1.06 XX =

23. Dividing Fractions 1 ÷ 1 = 2 4 becomes 1 2 x 4 1 = 2