6th Grade Math · Evaluating Expressions
Two variables Worksheets
Fresh practice, ready to print. Answer key included.
Expressions such as 4a − b when a = 6 and b = 9.
Make it yours
Or start with a ready-made version.
How it works: a quick refresher
The rules this worksheet practices, then one problem worked from start to finish.
| Strategy | How it works |
|---|---|
| A number beside a letter means multiply | 3x means 3 times x. If x = 5, then 3x = 15. |
| Substitute first | Replace every letter with the value you were given, then compute. 3x + 4 when x = 5 becomes 3 × 5 + 4. |
| Then use the order of operations | Multiply before you add. Parentheses happen before either of those. |
| Two letters get two values | In 4a − b, replace a and b separately. Do not add the letters together first. |
| The value should match a check | Put the value back in. If the expression was a subtraction, the result on these pages is never negative. |
Worked example
Find 3x + 4 when x = 5.
- 1Replace x with 5: 3 × 5 + 4.
- 2Multiply first: 3 × 5 = 15.
- 3Then add: 15 + 4 = 19.
- 43x + 4 = 19 when x = 5.
Ready-made versions
Three fixed versions you can link to or share. Each is a PDF with its own answer key.
- Two variables Worksheets, version 1Worksheet PDFAnswer key PDF
- Two variables Worksheets, version 2Worksheet PDFAnswer key PDF
- Two variables Worksheets, version 3Worksheet PDFAnswer key PDF
Grade level and standard
Written for 6th grade math (expressions and equations) and aligned to CCSS 6.EE.A.2. It also works as review in later grades.
Common questions
- Is there an answer key?
- Yes. Every worksheet has a matching answer key with each answer worked on the same grid or layout as the question. The worksheet ID printed at the bottom of each page pairs a sheet with its key.
- Do any answers come out negative or as a fraction?
- No. The values were chosen so every division comes out even and every result is a whole number, zero or above.
- Why do the letters change from problem to problem?
- A letter is only a name for the number. x, n, a, and m all work the same way once you substitute.
- How many different versions are there?
- About a million per skill. Each time you press the button the problems are generated fresh, so you can print a different version for every student, a retake, or another night of practice.
- Are the worksheets free?
- Yes. They are free to print and copy for your home or classroom, with no sign-up.