IXL - Evaluate numerical expressions involving rational numbers (Algebra 1 practice)

or

Evaluate the expression.

4

5

–

2

5

+

1

5

Write your answer as a fraction or as a whole or mixed number.

ref_doc_title.

or

Learn with an example

question

Evaluate the expression.

2

+

0.8

÷

0.4

Write your answer as an integer or a decimal. Do not round.

key idea

To evaluate an expression with multiple operations, you can follow the order of

operations:

Perform operations inside parentheses.
Evaluate exponents.
Multiply and divide from left to right.
Add and subtract from left to right.

solution

First, identify the operations in the expression.

2

+

0.8

÷

0.4

This expression has addition and division. The order of operations says to divide before adding.

2

+

0.8

÷

0.4

=

2

+

2

Now, add.

2

+

2

=

4

The value of the expression is 4.

Looking for more? Try these:

Lesson: Order of operations

Lesson: Adding and subtracting rational numbers

Lesson: Multiplying and dividing rational numbers

or

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Teacher tools

Work it out

Not feeling ready yet? These can help:

A.2Evaluate numerical expressions involving integers

A.4Add and subtract rational numbers

A.5Multiply and divide rational numbers

R.2Powers with decimal and fractional bases

Lesson: Order of operations

Lesson: Adding and subtracting rational numbers

Lesson: Multiplying and dividing rational numbers