Estimating Quantities in Scientific Notation

The length of a cell is 0.000909 mm. Which of the following is the best estimate of the length written using scientific notation?

Mathematical Equivalence

OFF

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Which of the following is 9.2 X 10⁷ written in standard form?

• 0.00000092

• 9.2000000

• 920,000,000

• 92,000,000

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8.025 x 10^-8

• .00000008025

• .000000008025

• 802,500,000,000

• 80,250,000,000

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Express the following in
standard decimal notation:
8.025 x 10^-8

• 0.00000008025

• -0.000000008025

• -802,500,000,000

• 80,250,000,000

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CCSS.8.EE.A.3

3.46 x 10^-6 = ___________________.

• 0.000000346

• 0.0000346

• 0.00000346

• 0.000346

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Express the following in standard notation:

8.025 x 10^-8

• .000 000 080 25

• .000 000 008 025

• 802,500,000,000

• 80,250,000,000

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CCSS.8.EE.A.3

4.2 x 10⁶

• 4,200,000

• 0.0000042

• 42,000,000

• 0.00042

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Express in standard form.

• A

• B

• C

• D

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The circumference of the Earth at the equator is about 24,900 miles. Express this number in scientific notation.

• 249x10²

• 2.49x10²

• 2.49x10⁴

• 24.9x10⁴

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CCSS.8.EE.A.3

The length of the Amazon River in South America is 6,400 kilometers. What is this length written in scientific notation?

• 6.4 x 10²

• 6.4 x 10³

• 6.4 x 10^-4

• 6.4 x 10^-3

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CCSS.8.EE.A.3