Edexcel IGCSE Maths 复习笔记 2.6.3 Algebraic Fractions - Multiplying & Dividing

What is an algebraic fraction?

• An algebraic fraction is simply a fraction with an algebraic expression on the top (numerator) and/or the bottom (denominator)

Dividing algebraic fractions

• Never try to divide fractions
• Instead “flip’n’times”
• So “÷a/b” becomes “×b/a”and then follow the rules for multiplying…

Multiplying algebraic fractions

1. Simplify by factorising and cancelling (ignore the × between the fractions)
2. Multiply the tops (numerators)
3. Multiply the bottoms (denominators)
4. Simplify by factorising and cancelling (if you missed something earlier).

Worked Example

转载自savemyexam