Real Numbers Unit Practice

 $a^{-1}$  is equal to 

• a

• 1

• 0

•  $\frac{1}{a}$  

Tags

CCSS.8.EE.A.1

Which fraction is not a repeating decimal?

• 2/5
• 1/3
• 2/3
• 4/9

A small square garden has an area of 81 square feet, What is the length of each of the garden's sides?

• 9 feet
• 18 feet
• 32 feet
• 10 feet

A scientist counted  23,500,000 bacteria in a sample. What is this number in scientific notation?

• 23.5 x 10⁶
• 2.35 x 10⁷
• 2.35 x 10⁸
• 2.35 x 10⁶

A doctor measured a blood cell and found it to be 2.3 x 10^-8 inches long. What is this in Standard Form?

• .0000023
• .000000023
• .000023
• .0000000023

What is an estimate of the
square root of 21
 to the nearest one decimal place?

• 4.5
• 4.1
• 4.2
• 4.8

Tags

CCSS.6.NS.C.6

What goes in the empty box?
4^₾ x 4³ = 4^-6

• -9
• -2
• -6
• -4

Simplify into one numeric answer:
8¹² / (8⁵ * 8⁶)

• 64
• 16
• 8
• 2

What is the
numeric value of 3^-3 ?

• 1/9
• -27
• 1/27
• -1/9

Tags

CCSS.6.EE.A.1

Classify the following number:
-12

• whole, integer, rational, real
• integer, rational, real
• irrational
• whole, rational, real