8th Grade Math Review

• Irrational

• Rational

Answer explanation

Rational numbers can be written as fractions.

Classify 0.125

• Rational

• Irrational

Answer explanation

Rational numbers can be written as fractions.

Classify 4.786987085536990234...

• Rational

• Irrational

Answer explanation

This is irrational. It can not be expressed as a fraction because the digits go on forever but doesn't have a repeating pattern. (...)

Classify 0.66666666666666666... (repeats)

• Rational

• Irrational

Answer explanation

This is rational, the fraction is 2/3. If it doesn't terminate but it repeats, it is rational.

Tags

CCSS.8.NS.A.1

CCSS.7.NS.A.2D

• Rational

• Irrational

Answer explanation

Pi is irrational. It goes on forever without a repeating pattern. It cannot be expressed as a fraction.

Tags

CCSS.8.NS.A.1

• Rational

• Irrational

Answer explanation

This is rational, 25 is a perfect square. Its square root is 5.

• Rational

• Irrational

Answer explanation

Only perfect squares are rational.

Tags

CCSS.8.NS.A.1

Answer explanation

Multiply Exponents: Keep the base (2) and add the exponents (5 and 8).

Tags

CCSS.8.EE.A.1

Answer explanation

When dividing, keep the base and subtract the exponents.

Tags

CCSS.HSA.APR.A.1

Answer explanation

When raising a power to a power, we multiply the exponents.

Tags

CCSS.HSA.APR.A.1