1. Ch Test this ??? Homework

3. Get papers, sit down, get out homework and quietly work on bellringer
1.) 2^4 + 3^3 – 4^2 =
2.) t.t.t.t.4.4.x.x.x.s.s.s.s =

4. Ch 2-8
Scientific Notation

5. Scientific Notation
The first factor is greater than or equal to 1, but less than 10 and the second factor is a power of 10.
A short-hand way of writing
large numbers without
writing all of the zeros.

6. A number written using digits and place value .
Standard
Form
A number written using digits and place value .

7. Tell whether or not the following numbers are in scientific notation.
a.) .45 * b.) 7.15 * c.) 56 * 102
Yes because 7.15 is greater than or equal to 1 but less than 10
No because 56 is greater than 10
No because .45 is less than 1

8. The Distance From the Sun to the Earth
93,000,000

9. Step 1 93,000,000 = 9.3000000 Move decimal left
Leave only one number in front of decimal (so the number is greater than or equal to 1 and less than 10)
93,000,000 =

10. Step 2
Write number without zeros
93,000,000 = 9.3

11. Step 3 7 93,000,000 = 9.3 x 10 Count how many places you moved decimal
Make that your power of ten
93,000,000 = 9.3 x 10 7

12. The power of ten is 7 because the decimal moved 7 places. 7
93,000,000 = 9.3 x 10 7

13. 93,000, Standard Form
9.3 x Scientific Notation

14. Practice Problem -----> -----> -----> ----->
Write in scientific notation.
Decide the power of ten.
98,500,000 = 9.85 x 10?
64,100,000,000 = 6.41 x 10?
279,000,000 = 2.79 x 10?
4,200,000 = 4.2 x 10? 7
-----> 10
-----> 8
----->
-----> 6

15. Express 0.0000000902 in scientific notation.
Where would the decimal go to make the number be between 1 and 10?
9.02
The decimal was moved how many places? 8
When the original number is less than 1, the exponent is negative.
9.02 x 10-8

16. More Practice Problems
On these, decide where the decimal will be moved.
7.34
= ______ x 10-8
= ______x 10-11
= _____ x 10-10
8.7 9

17. Complete Practice Problems
Write in scientific notation.
7,200,000
802,000,000,000
1) 5.17 x 10-4
2) 7.2 x 106
3) 8.02 x 1011

18. Scientific Notation to Standard Form
Move the decimal to the right
3.4 x 105 in scientific notation
move the decimal to the right if exponent is positive
--->
340,000 in standard form

19. Scientific Notation to Standard Form
Move the decimal to the left
3.4 x 10-5 in scientific notation
move the decimal to the left if exponent is positive
--->
in standard form

20. Move the decimal to the right or left?
Write in Standard Form
Move the decimal to the right or left?
6.27 x 10-6
9.01 x 104
90,100

21. Homework
Pg 94
6-34 skip 26 evens only
Answers only no work to show 

23. Bellringer: Pg 42 of notes problem number 10
sit down get out homeworks put notes in order pages quietly work on bellringer
Bellringer: Pg 42 of notes problem number 10

24. Even More Practice
Below is a list of links to games and activities all having to do with scientific notation.