IXL | Classify numbers | 8th grade math

or

Which of the following are rational numbers?

10.444...

7

8

0

3

ref_doc_title.

or

Learn with an example

question

Which of the following is a rational number?

1

1

3

5

𝜋

3

key idea

Rational
numbers
can
be
written
as
a
b
(where
a
and
b
are
integers
and
b
is
not
zero).
When
written
as
decimals,
rational
numbers
terminate
or
repeat.

solution

1
1
3
can
be
written
as
4
3
,
which
is
a
fraction. So,
1
1
3
is
a
rational
number.

5
(which
is
2.23606...
)
cannot
be
written
as
a
fraction,
a
terminating
decimal,
or
a
repeating
decimal. So,
5
is
not
a
rational
number.

𝜋
(which
is
3.1415926...
)
cannot
be
written
as
a
fraction,
a
terminating
decimal,
or
a
repeating
decimal. So,
𝜋
is
not
a
rational
number.

3
(which
is
1.73205...
)
cannot
be
written
as
a
fraction,
a
terminating
decimal,
or
a
repeating
decimal. So,
3
is
not
a
rational
number.

So,
the
only
rational
number
is
1
1
3
.

Looking for more? Try these:

Lesson: Rational numbers

Lesson: Irrational numbers

Lesson: Integers

or

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Teacher tools

Work it out

Not feeling ready yet? These can help:

F.2Identify rational and irrational numbers

Lesson: Rational numbers

Lesson: Irrational numbers

Lesson: Integers