Real Number System

The number 0.14114111411114 . . . is

• natural

• rational

• irrational

• whole

Tags

CCSS.8.NS.A.1

CCSS.7.NS.A.2D

Which of the following best completes the statement?

A rational number ...

• is a nice number

• is a whole number

• is a number that can be written as a fraction or ratio

• is also irrational

Tags

CCSS.8.NS.A.1

Which number is irrational?

• $\sqrt{9}$

• $\sqrt{8}$

• $0.3333$

• $\frac{2}{3}$

Tags

CCSS.8.NS.A.1

Which expression is rational?

• $\pi$

• $\sqrt{\frac{1}{2}}$

• $\sqrt{3}$

• $\sqrt{\frac{4}{25}}$

Which statement is not always true?

• The product of two irrational numbers is irrational.

• The product of two rational numbers is rational.

• The sum of two rational numbers is rational.

• The sum of a rational number and an irrational number is irrational.

Tags

CCSS.7.NS.A.2C

The sum of  $\sqrt{9}$   and $\frac{2}{3}$   is

• irrational because both numbers are irrational

• rational because both numbers are rational 
  

• irrational because one number is irrational

• rational because one number is rational

Tags

CCSS.7.NS.A.1D

True or False?

All integers are whole numbers.

• True

• False

A teacher asked the class to solve the equation

 $3\left(x\ +\ 2\right)=21$  
Robert wrote  $3x\ +\ 6\ =\ 21$   as his first step.  Which property did he use?

• Associative

• Commutative

• Addition

• Distributive

Tags

CCSS.HSA.REI.A.1

Which property is illustrated by the equation 

 $5\ +\left(3\ +\ x\right)\ =5\ +\ \left(x\ +\ 3\right)\$  ?

• associative property of addition

• associative property of multiplication

• distributive property

• commutative property of addition

Tags

CCSS.1.OA.B.3

A teacher wrote the following set of numbers on the board:

 $a\ =\ \sqrt{20}\ \ \ \ \ \ \ b\ =\ 2.5\ \ \ \ \ \ \ c\ =\ \sqrt{25}$  

           Explain why a + b is irrational, but b + c is rational.

Tags

CCSS.7.NS.A.1D