Pre-Alg 6.7 Scientific Notation

1. Pre-Algebra
Lesson 6.7
Scientific Notation

2. Table Discussion
Scientific
Notation

3. http://www.youtube.com/watch?v=HEheh1BH34Q

5. Review: Positive & Negative Exponents
10
0
10
1
10
4
10
-2
10
-4

6. http://powersof10.com/

7. Avogadro's Number
602200000000000000000000
the number of
molecules in a
mole of a substance

8. http://goo.gl/ZMQEgd

9. Scientific Notation
10
n
10
-n
If the power is positive, move decimal
to the right (number gets bigger)
If the power is negative, move decimal
to the left (number gets smaller)
1 x 10
5
1 x 10
-5

10. Scientific Notation --> Standard form
Try these problems:
1) 3.45 x 10
4
2) 8.9 x 10
10
3) 2.2 x 10
-3
4) 3.14 x 10
-7
34500
89000000000
.0022
.000000314

11. SN --> SF
summarize

12. Standard form --> Scientific Notation
If you move the decimal point to the left,
then the power of ten will be positive.
56500
If you move the decimal point to the right,
then the power of ten will be negative.
.00021

13. Standard form --> Scientific Notation
Try these problems:
1) 7294
2) 100000
3) .00035
4) .088

7.294 x 10
3
1 x 10
5
3.5 x 10
-4
8.8 x 10
-2

14. SF --> SN
summarize

15. Multiplying Numbers in Scienfitic Notation
Scientific
(3.2 x 10
2
) x (1.8 x 10
4
)
3.2 x 1.8 x 10
2
x 10
4
5.6 x 10
(2+4)
5.6 x 10
6

16. Multiplying Numbers in Scienfitic Notation
Scientific
(3 x 10
-3
) x (2.05 x 10
5
)
3 x 2.05x
10
-3+5
6.15
x 10
-2
6.15 x 10
-2

17. In the OLS...