Comparing Numbers in Scientific Notation

Place the following numbers in order from least to greatest.

7.8 x 10^-6

-1.25 x 10⁵

-5.1 x 10⁴

4.09 x 10⁴

• 7.8 x 10^-6

  -1.25 x 10⁵

  -5.1 x 10⁴

  4.09 x 10⁴

• 4.09 x 10⁴

  -5.1 x 10⁴

  -1.25 x 10⁵

  7.8 x 10^-6

• -1.25 x 10⁵

  -5.1 x 10⁴

  7.8 x 10^-6

  4.09 x 10⁴

Which of the following numbers is the smallest?

• -7 x 10^-8

• 7 x 10²

• 7 x 10^-9

• -7 x 10⁴

Which number is the greatest?

• 5.251 x 10⁵

• 2.5579 x 10⁵

• 5.55 x 10⁵

• 5 x 10⁵

Which of these numbers is greatest?

• 9 x 10⁹

• 8 x 10⁹

• 9 x 10⁸

• 8 x 10⁸

The diameter of the planet Mercury is 4.87 x 10³ kilometers. The diameter of the planet Venus is 1.21 x 10⁴ kilometers. The diameter of Earth is 1.28 x 10⁴  kilometers. The diameter of Mars is 6.79 x 10³ kilometers. Which planet has the smallest diameter?

• Mercury
• Earth
• Venus
• Mars

Tags

CCSS.6.EE.A.1

CCSS.6.NS.C.7