Math 8 Benchmark 1 Review (1) Review of the Real Number System

Rachel states that -5.5 is an integer because it is negative.

Is she correct?

Why or why not?

• Yes, because all negatives are integers.

• Yes, because all integers have decimals.

• No, because integers do not have decimals.

• No, because integers cannot be negative.

Classify this number:  6.7

• real
• real      rational
• real      rational        integer
• real   rational   integer   whole

Is ½ a terminating decimal or a repeating decimal?

• terminating decimal
• repeating decimal

Tags

CCSS.8.NS.A.1

CCSS.7.NS.A.2D

Classify this number:  -12

• real
• real      rational
• real       irrational
• real         rational        integer

-4 is not a whole number because:

• It's negative and whole numbers are positive.
• it's irrational.
• it cannot be turned into a fraction.
• it is even.

A rational number:

• can be turned into a fraction.
• is only positive.
• can't have a decimal.
• is not a real number.

Tags

CCSS.8.NS.A.1

CCSS.7.NS.A.2D

8 is a part of the following sets: 

• Whole Number
• Integer
• Rational
• All of the above

Which number is an irrational number?

• 2.5
• 5.72314.....
• -17
• 1/2

Tags

CCSS.8.NS.A.1

An example of an integer is...

• 9.1
• 8/9
• -9
• -2.3

Which word does NOT describe 5?

• Whole
• Integer
• Rational
• Irrational