Rational vs. Irrational

Is $\sqrt{2}$  irrational or rational?

• Irrational

• Rational

The area of a square painting is 81 cm².  What is the side length of the painting?

• 40.5 cm
• 162 cm
• 6,561 cm
• 9 cm

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Which of the following numbers is irrational?

• $\sqrt{8}$

• $\frac{3}{4}$

• 2

• -1.325

Tags

CCSS.8.NS.A.1

Which of the following is rational?

• .211232112421125. . . .

• $\pi$

• $\sqrt{25}$

• $\sqrt{12}$

Tags

CCSS.8.NS.A.1

TRUE OR FALSE:

The square root of 31 is irrational.

• False

• True

Tags

CCSS.8.NS.A.1

Is  $\frac{2}{3}$  a rational or irrational number?

• Rational

• Irrational

As a fraction, this decimal would be...

• $\frac{1}{2}$

• $\frac{1}{10}$

• $\frac{1}{90}$

• $\frac{1}{9}$

Tags

CCSS.7.NS.A.2D

CCSS.8.NS.A.1

Write this decimal as a fraction.

• $\frac{7}{50}$

• $\frac{14}{9}$

• $\frac{7}{45}$

• $\frac{14}{99}$

Tags

CCSS.7.NS.A.2D

CCSS.8.NS.A.1

Select all the RATIONAL numbers.

• -13

• 3

• 0.18181818...

• $\sqrt{81}$

• $\sqrt{5}$

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 ratio.
• A rational number cannot be a repeating  decimal.

Tags

CCSS.5.NBT.A.2