Common mistakes in O-Level Maths algebra and how to avoid them

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Whats a common mistake when expanding brackets in O-Level Maths algebra?

Forgetting to multiply *every* term inside the bracket by the term outside. Always double-check your distribution to avoid this error.

How can I avoid sign errors when solving algebraic equations?

Be meticulous when moving terms across the equals sign. Remember to change the sign of the term being moved. Practice with various equations to build confidence.

Whats a frequent mistake when dealing with fractions in algebraic expressions?

Not finding a common denominator before adding or subtracting fractions. Always find the least common multiple (LCM) of the denominators first.

How do I avoid errors when factorising quadratic equations?

Practice different factorisation techniques and always check your answer by expanding the brackets to see if you get back the original quadratic expression.

Whats a common mistake when solving simultaneous equations?

Errors in substitution or elimination. Double-check your arithmetic when substituting values or eliminating variables to avoid inaccuracies.

How can I prevent mistakes when dealing with inequalities?

Remember to flip the inequality sign when multiplying or dividing by a negative number. This is a crucial rule often overlooked.

Whats a typical error when working with algebraic word problems?

Misinterpreting the problem and setting up the wrong equation. Read the problem carefully, identify the unknowns, and translate the information into a correct algebraic equation.

How do I avoid careless mistakes during O-Level Maths algebra exams?

Practice past papers under timed conditions to simulate exam pressure. This helps improve speed and accuracy and reduces silly errors.