Evaluating Expressions with Rational Numbers
PrintPrint this worksheet, clean and free, at stepsies.com.
Sheet 128 has new questions in the same layout. Print it to see them.
Evaluating Expressions with Rational Numbers
Evaluating expressions with rational numbers: twelve expressions such as 6x + 3 and x² + y for values like x = −3/4 and y = −1.5. Grade 8, with an answer key.
Type the answers or write with a mouse, touchpad or finger. The work stays on your device.
Your first print is free, with no sign-in. Then 10 sheets a month with a free account. Prints on Letter paper, or print on A4.
Make a new sheetSheet 128 of 268, each with its own answer key · Back to Sheet 1
Teach it first
Evaluating ExpressionsA teaching handout to hand out before this sheet: the rule, worked examples and common mistakes.- Pages
- 1
- Last updated
- Time
- About 15 minutes
- Answer key
- Included
- Printing
- Black and white
- Related curriculum
-
Write expressions with letters for numbers from words, name their parts, work out their value for given numbers, and write equivalent expressions by collecting like terms and using the distributive property.
Reviewed by Mr. Robert Harrison, Teacher. How we check worksheets
How to use this sheet
- Have the child replace each variable with its value in brackets before working anything out.
- For like terms, have the child circle the terms with the same variable in the same way.
- For the distributive property, draw arrows from the number outside to every term inside the brackets.
Common mistakes
- Reading 3x as 3 plus x, or as a two-digit number when x = 4, so 3x becomes 34. It is 3 × 4.
- Multiplying only the first term inside the brackets, so 2(x + 5) becomes 2x + 5.
- Combining unlike terms, so 3x + 2 becomes 5x.
