1. CALCULATOR MANIPULATION

2. Due to the differences in calculators you will have to be able to use your own effectively

3. THE BIG “E”! An “ E ” represents: An “ E ” represents: Ex: Ex: x 10 3 = E3 x 10 3 = E3 3.24 x 10 5 = 3.24E5 3.24 x 10 5 = 3.24E5 6.87 x 10 -9 = 6.87E-9 6.87 x 10 -9 = 6.87E-9 x 10

4. Adding and Subtracting SCI. NOT. PROBLEM: 1.56 x 10 4 + 5.82 x 10 2  THIS IS WHAT YOU ENTER INTO YOUR CALCULATOR: 1.56E4 + 5.82E2  DO NOT ENTER: 1.56x10^4 + 5.82x10^2

5. ANSWER 1.618 E 4 ROUND! 1.62E4 OR 1.62 x 10 4

6. ROUNDING RULE DO NOT ROUND UNTIL YOUR FINAL ANSWER

7. 5.145E3 – 2.94E11 = -2.94 x 10 11 7.34E13 + 4.84412E-12 = 7.34 x 10 13 5696 – 45.6785 = 5.65 x 10 3 5696 – 45.6785 = 5.65 x 10 3 1. 5.145 x 10 3 – 2.94 x 10 11 2. 7.34 x 10 13 + 4.84412 x 10 -12 3. 5696 – 45.6785 PRACTICE:

8. PROBLEM: 6.123 x 10 7 / 1.8267 x 10 2 ENTER: 6.123E7/1.8267E2 ONCE AGAIN MAKE SURE YOU ARE NOT ADDING x10^ ! 3.35 E5 OR 3.35 x 10 5 Multiplying and Dividing SCI. NOT.

9. PRACTICE:  3.362 x 10 1 * 8.11267 x 10 24 2.73 E26  12331 / 1.8267 x 10 -62 6.75 E65  3 * 9 2.70 E1  2.45123 x 10 -97 / 9.89377 x 10 90 0

10. THREE NUMBER RULE oIF THERE ARE NOT ENOUGH NUMBERS ADD ZEROS oIF THERE ARE TOO MANY NUMBERS ROUND