IXL | Solve one-step addition and subtraction equations with decimals and fractions

Solve for

7.65

–

4.35

ref_doc_title.

Learn with an example

question

Solve for

1.9

–

3.3

key idea

A solution to an equation is a value of the variable that makes the equation true.

To solve an equation, you can use inverse operations to get the variable by itself.

Addition and subtraction are inverse operations.
Multiplication and division are inverse operations.

Do the same operation to both sides of the equation to preserve equality.

solution

First, identify the operation in the equation.

1.9

–

3.3

The variable

is subtracted by 3.3. To get

by itself, add 3.3 to both sides of the equation.

1.9

3.3

–

3.3

1.9

3.3

5.2

To check your answer, substitute the value of the variable into the equation. If the equation is true, your answer is correct.

1.9

–

3.3

1.9

5.2

–

3.3

1.9

This equation is true

1.9

This equation is true

Looking for more? Try these:

Lesson: Solving equations

$Confetti$

Excellent!

Now entering the Challenge Zone—are you ready?

Questions
answeredQuestions

Time
elapsedTime

hr	min	sec
00	00	04

SmartScore
out of 100
IXL's SmartScore is a dynamic measure of progress towards mastery, rather than a percentage grade. It tracks your skill level as you tackle progressively more difficult questions. Consistently answer questions correctly to reach excellence (90), or conquer the Challenge Zone to achieve mastery (100)! Learn more

Teacher tools

Work it out

Not feeling ready yet? These can help:

AA.8Solve one-step addition and subtraction equations with whole numbers

K.6Add and subtract mixed numbers

H.1Add and subtract decimal numbers

Lesson: Solving equations

Excellent! You got that right!

Jumping to level 1 of 1

Excellent!