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Scientific Notation

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Scientific Notation Student Expectation: 8th Grade: 8.1.1D Express numbers in scientific notation, including negative exponents, in appropriate problem situations. – PowerPoint PPT presentation

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Title: Scientific Notation


1
Scientific Notation
  • Student Expectation
  • 8th Grade
  • 8.1.1D Express numbers in scientific notation,
    including negative exponents, in appropriate
    problem situations.

2
Scientific Notation
A short-hand way of writing large numbers
without writing all of the zeros.
3
The Distance From the Sun to the Earth
93,000,000
4
Step 1
  • Move decimal left
  • Leave only one number in front of decimal

93,000,000 9.3000000
5
Step 2
  • Write number without zeros

93,000,000 9.3
6
Step 3
  • Count how many places you moved decimal
  • Make that your power of ten

7
The power of ten is 7 because the decimal moved
7 places.
8
  • 93,000,000 --- Standard Form
  • 9.3 x 107 --- Scientific
    Notation

9
Practice Problem
Write in scientific notation. Decide the power
of ten.
  1. 98,500,000 9.85 x 10?
  2. 64,100,000,000 6.41 x 10?
  3. 279,000,000 2.79 x 10?
  4. 4,200,000 4.2 x 10?

10
More Practice Problems
On these, decide where the decimal will be moved.
  1. 734,000,000 ______ x 108
  2. 870,000,000,000 ______x 1011
  3. 90,000,000,000 _____ x 1010

Answers
3) 9 x 1010
  1. 7.34 x 108

2) 8.7 x 1011
11
Complete Practice Problems
Write in scientific notation.
  1. 50,000
  2. 7,200,000
  3. 802,000,000,000

Answers
1) 5 x 104
2) 7.2 x 106
3) 8.02 x 1011
12
Scientific Notation to Standard Form
Move the decimal to the right
  • 3.4 x 105 in scientific notation
  • 340,000 in standard form

13
Write in Standard Form
Move the decimal to the right.
  • 6.27 x 106
  • 9.01 x 104
  • 6,270,000
  • 90,100
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