IXL | Evaluate numerical expressions involving rational numbers

Evaluate the expression.

–

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

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Learn with an example

question

Evaluate the expression.

0.4

–

0.2

0.3

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.

0.4

–

0.2

0.3

This expression has subtraction and addition. The order of operations says to add and subtract from left to right.

0.4

–

0.2

0.3

0.2

0.3

0.2

0.3

0.5

The value of the expression is 0.5.

Looking for more? Try these:

Lesson: Order of operations

Lesson: Adding and subtracting rational numbers

Lesson: Multiplying and dividing rational numbers

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Teacher tools

Work it out

Not feeling ready yet? These can help:

G.3Add and subtract mixed numbers

D.8Add, subtract, multiply, or divide two decimals

B.25Evaluate numerical expressions involving integers

Lesson: Order of operations

Lesson: Adding and subtracting rational numbers

Lesson: Multiplying and dividing rational numbers

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