Rational or Irrational Numbers and Decimal Expansion

What is a rational number ?

• A rational number  is a number that cannot be written as a fraction.
• A rational number is a number that can be written as a fraction.
• A rational number cannot be a repeating  decimal.

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CCSS.5.NBT.A.2

What type of number is π ?

• Rational
• Irrational

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CCSS.8.NS.A.1

CCSS.8.NS.A.2

Which number is irrational?

• 9.6
• √45
• 3/8
• 3.4 x 10 ⁵

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CCSS.8.EE.A.2

CCSS.8.NS.A.1

Which number is a rational number ?

• 1/4
• π
• √3
• ∛25

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CCSS.8.NS.A.1

√25

• Rational
• Irrational

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CCSS.8.NS.A.1

-17.565

• Rational
• Irrational

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CCSS.8.NS.A.1

The decimal of an irrational number doesn't repeat with a pattern.

• true
• false

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CCSS.7.NS.A.2D

CCSS.8.NS.A.1

• 7/50
• 14/9
• 7/45
• 14/99

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CCSS.7.NS.A.2D

CCSS.8.NS.A.1

• 77/25
• 77/250
• 308/9
• 308/999

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CCSS.7.NS.A.2D

CCSS.8.NS.A.1

Write as a repeating decimal.
8/9

• 0.̅8
• 1.5̅8
• 0.0̅8
• 0.9̅8

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CCSS.7.NS.A.2D

CCSS.8.NS.A.1