8th Grade Math 1st 9 weeks REview

A box contains 5x10³ paper clips. The mass of each paper clip is 8x10^-4 kilograms. What is the combined mass of the paper clips in the box?

• 4 kilograms

• 4x10⁷ kilograms

• 40 kilograms

• 4x10^-7 kilograms

Tags

CCSS.8.EE.A.4

Which is the best estimate of √28?

• 5.1

• 5.3

• 5.2

• 14

Tags

CCSS.8.NS.A.2

π...rational or irrational

• rational

• irrational

Tags

CCSS.8.NS.A.1

Which best decribes an irrational number?

• Any number that can be expresses as a fraction.

• A number that is a non-terminating, non-repeating decimal.

• A positive or negative whole number.

• The square root of any whole number.

Tags

CCSS.8.NS.A.1

Write the answer in scientific notation.

(4.1 x 10⁵ )+ (5.5 x 10⁶ )=

• 4.65 x 10⁵

• 9.6 x 10⁵

• 9.6 x 10¹¹

• 5.91 x 10⁶

Tags

CCSS.8.EE.A.4

Divide:

(6.9 x 10⁷) / (2.3 x 10^-3)

• 3x10¹⁰

• 3x10^-4

• 3x10⁴

• 3x10^-11

Tags

CCSS.8.EE.A.4

In between what 2 integers is the square root of 77?

• 5 and 6

• 6 and 7

• 7 and 8

• 8 and 9

Tags

CCSS.8.NS.A.2

Simplify the expression using exponents.

• 81⁸

• 9¹⁵

• 9⁸

• 81¹⁵

Tags

CCSS.8.EE.A.1

Write the decimal as a fraction in simplest form

• 
• 
• 
• 

Tags

CCSS.8.NS.A.1

Using exponents, what is the simplified form of the expression (2⁴)⁷

• 2³

• 14²⁸

• 2²⁸

• 2¹¹

Tags

CCSS.8.EE.A.1