Lesson 1.9: Understand Scientific Notation

Lesson 1.9

Understand Scientific Notation​

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Definition:

Scientific Notation:​ To write a number in scientific notation, we write it as a multiple of 10. We do this to make numbers look more "clean".

Subject | Subject

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​Key Concept:

​Example: The sun is 1.5 X 10⁸ miles from Earth. Write this distance in expanded form.

Multiple Choice

Write 2.4 X 10⁶ in expanded form.

• 24,000,000

• 2,000,000

• 2,400,000

• 10,000,000

Multiple Choice

Write 5.45 X 10⁴ in expanded form.

• 5,450,000

• 54,500

• 10,000

• 545

​Write 0.0000000000000000857 in scientific notation:

Multiple Choice

Write 0.00000245 in scientific notation

• 2.45 X 10⁶

• 245 X 10⁸

• 245 X 10^-8

• 2.45 X 10^-6

Multiple Choice

Write 0.000000999 in scientific notation:

• 999 X 10⁹

• 9.99 X 10⁷

• 9.99 X 10^-7

• 999 X 10⁹

Multiple Choice

Write 80,000 in scientific notation

• 8 X 10⁴

• 8 X 10^-4

• 8 X 10⁶

• 8 X 10^-6

​Conclusion: Write two complete sentences about what you learned today.