Common Pre-Algebra Mistakes
Example: Simplifying a Fraction
Simplify the expression:
What the student wrote:
With a step added to show what it appears was computed in the student's head, find the mistake:
(Roll the mouse over the algebra to see a hint in red)
(Roll the mouse over the area above to see the correction in blue)
Use care with signs. A good strategy is to write down intermediate steps, which makes you take the time needed to simplify correctly.
Visit Algebra Facts > Adding and subtracting fractions to learn more.
Home Page |
Common Algebra Mistakes |