1. Catalyst 1. Write 4800 in scientific notation. 2. What is product of 3.4 x 10 3 and 1.0 x 10 -1 ? 3. Simplify (8.8 x 10 3 ) 2.

2. Today’s Objectives SWBAT add and subtract using scientific notation. SWBAT read and decipher word problems to decide which operation (+, -, *, or ÷) is to be used. SWBAT apply scientific notation to real-word problems.

3. To add or subtract scientific notation 1. Convert one of the numbers so that both numbers have the same exponent.  Always convert to the smallest exponent of ten. 2. Add or subtract the numbers multiplied by powers of 10 3. keep the exponent of 10 the same. 4. If necessary, move the decimal point and change the exponent of 10 so that the answer is in scientific notation.

4. Simplify the expression, 1.31 × 10 5 + 3.27 × 10 3. 1. Write 1.31 × 10 5 in terms of 10 3. 1.31 × 10 5 = 131 × 10 3 2. Add the numbers by adding the numbers multiplied by the power of ten and keeping the power of 10 the same. 131 × 10 3 + 3.27 × 10 3 = (131 + 3.27) × 10 3 = 134.27 × 10 3 3. Write the answer in scientific notation. 134.27 × 10 3 = 1.3427 × 10 5

5. How Can You Do it Easily on Your Calculator?

6. On the Algebra EOC, on our Unit Assessment, and in high school, you will see scientific notation used in word problems The hardest part is how to know which operation to choose to use. Here are some key words to look for in each.

7. Clues for Addition Plus Sum

8. Clue Words for Subtraction How many more Difference

9. Clue Words for Multiplication Times Product X ()()

10. Clue Words for Division Ratio How many times ____________ Per Into Quotient / ÷ #

11. Example What is the ratio of Milky Way radius to our solar system radius given that, the distance from Pluto to sun is 5.9×10 12 meters and the Milky Way disk radius is. 3.9×10 20 meters.

12. Beat the Teacher! Work with your partner to complete the problem If you finish before me with the answer correct, your side of the room will get a point Ten bonus points for the winning team on the quiz Problems should be solved in your notebook

13. The human eye blinks about 6.25 x 10 6 times each year. About how many times has the eye of a 14 year old blinked? Write answer in scientific notation.

14. The distance between Mars and Earth varies over time. The greatest distance between the two planets is about 401,300,000 kilometers. The shortest distance is 54,500,000. Which of the following shows the difference in kilometers between these distances written in scientific notation? A. 3.468×10 5 B. 3468 ×10 -5 C. 3.468 ×10 8 D. 3.468×10 -8

15. The temperature of the core of the sun is 27,000,000ºF. The temperature of the core of Earth is 800ºF. How many times hotter is the core of the sun than the core of Earth?

16. BEAST QUESTION! Currently, Auburn graduates make an estimated amount of 4.12 x 10 12 dollars in the pros. What is the amount of money that Auburn grads other than Cam Newton and Jason Campbell?

17. Independent Practice Complete the problems independently and silently Show ALL work