Real Number QUICK CHECK

-18.95 belongs to which sets:

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

Tags

CCSS.6.NS.C.5

CCSS.6.NS.C.6

Which number is an irrational number?

• 2.5
• 5.72314.....
• -17
• 1/2

The product of a rational number and an irrational number is always an irrational number.

• Sometimes true, except when you multiply by 0

• Never true

• Always true

The sum of two irrational numbers is a rational number.

• Never true

• Sometimes true

• Always true

Fill in the blank.

The product of two irrational numbers is _________ an irrational number.

• always

• sometimes

• never

The number set shown below belongs to which of the following subsets of the real numbers?

{-5, -2, 4, 5, 17, 20, 25, 29, 35}

• Integers, Natural, and Whole

• Integers, Natural, Rational and Whole

• Integers and rational

• Natural and Whole

Is the number below rational, irrational, both rational and irrational, or neither rational nor irrational?
 $0.24242424...$  

• neither rational nor irrational

• rational

• irrational

• both rational and irrational

Non-terminating decimals are __________ rational numbers.

• Always

• Sometimes

• Never

Repeating decimals are _________________ rational numbers.

• Always

• Sometimes

• Never

Does the set of numbers below contain rational numbers, irrational numbers, both rational and irrational numbers, or neither rational nor irrational numbers?
 $\left\{71,\ \frac{42}{2},\ \sqrt{25},\ 14.68\right\}$  

• neither rational nor irrational

• rational 

• both rational and irrational

• irrational