The Real Number System

Which number is an example of an integer?

• -8

• $\frac{3}{7}$
  

• $\sqrt{3}$

• 12.6

Answer explanation

Integers are negative numbers, positive numbers and zero. Decimals and fractions are NOT integers!

"Pi" is the best example of why type of number?

 $\pi$  

• Rational

• Irrational

• Whole

• Integer

Answer explanation

Irrational Numbers are decimals that go on and on and never repeat...a bunch of random numbers that keep going! 

The number 12.25 is what type of number?

• Rational

• Integer

• Irrational

• Whole

Answer explanation

Rational decimals will either terminate (end) or have a pattern. They can also be written as a fraction...

$12\ \frac{1}{4}$ = 12. 25

Which number is considered a natural number?

• $\sqrt{5}$

• 2

• -15

• 24.56565656...

Answer explanation

Natural numbers are your "counting numbers" ex..1, 2, 3, 4, 5, ...

Which numbers are an example of a whole number?

• 0 and 5

• -2 and -7

• 2.5 and 9.9

• $\frac{1}{2}$ and $-\sqrt{36}$

Answer explanation

Whole numbers start with zero and count up (no decimals or fractions)
0, 1, 2, 3, 4, 5, ...

What type of number is the result of

4.5 + 1.5 = ___?

• 6 ; natural number

• 6 ; irrational number

• 5 ; whole number

• 5.5 ; rational number

Mr. Hart was bored one day and sat on his front porch and counted the number of cars that passed by.

What type of numbers would he classify his answer?

• Rational

• Irrational

• Integer

• Whole

Answer explanation

Whole; because he could have watched zero cars pass by... 0 cars, 1 car, 2 cars, 3 cars, 4 cars,...

Classify the number 0

• Whole
• Integer
• Rational
• All of the above

Tags

CCSS.6.NS.C.5

CCSS.6.NS.C.6

-14 could NOT be which type of number?

• Integer
• Real
• Rational
• Natural

Tags

CCSS.8.NS.A.1

How would you classify the following answer...

 $3.5\ +\ \sqrt{2}\ =\$  ____ ? 

• Rational

• Irrational

• Whole

• Integer