Class 8 Maths - MP
Fractions in Disguise
In the chapter 'Fractions in Disguise' for Class 8 MP Board mathematics, students explore advanced forms of fractions including rational expressions, algebraic fractions, and complex fractions. This chapter teaches you how to simplify expressions that look complicated by factoring numerators and denominators, finding common denominators, and applying basic operations like addition, subtraction, multiplication, and division to disguise rational numbers. Mastering this chapter is essential for scoring well in your MP Board exams as it bridges basic arithmetic fractions with high school algebra, forming the foundation for solving complex algebraic equations and inequalities.
Start Learning FreeKey Concepts
Algebraic Fractions
Fractions where both the numerator and denominator are algebraic expressions containing variables.
Simplification by Factoring
The process of breaking down algebraic expressions into their simplest factors to cancel out common terms in a fraction.
Least Common Multiple (LCM) in Fractions
Finding the LCM of algebraic denominators to add or subtract unlike algebraic fractions successfully.
Complex Fractions
A fraction whose numerator, denominator, or both contain one or more fractions, which can be solved by multiplying by the reciprocal.
Undefined Values
Values of the variable that make the denominator of a fraction zero, which must be excluded from the domain.
Important Formulas
Board Exam Info
In the MP Board Class 8 Mathematics examination, this chapter typically carries around 6 to 8 marks. Questions usually include 1-2 objective or fill-in-the-blank questions, one short-answer simplification problem (2-3 marks), and one long-answer word problem or complex fraction evaluation (4 marks).
Frequently Asked Questions
Why are they called 'Fractions in Disguise'?
They are called fractions in disguise because they look like complicated algebraic expressions, but once you factor them, they simplify into basic fractions.
Can I cancel terms before factoring the expression?
No, you can only cancel factors (things that are multiplied), never terms (things that are added or subtracted). You must factor the expression first.
How do I know which values to exclude from the domain?
Set the denominator equal to zero and solve for the variable. Those values make the fraction undefined and must be excluded.
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