1MPES2 Reduce Fractions Multiply and Divide on Ecole Supérieure de Commerce de Neuchâtel Pierre Marchal Attribute to: Pierre Marchal (Lycée Jean-Piaget)

Objectives of the course By the end of the course, you should be able to: – Factorize the numerator and the denominator – Identify the common factors – Reduce the common factors – Multiply and divide fractions

Reduce Fractions To reduce fractions we common divide out factors

EXAMPLES OF APPLICATION

3  8 3  5 = Remember : First factorize Identify the common factor Reduce the common factor 8 5

6  8 6  3 = Remember : First factorize Identify the common factor Reduce common factor 8 3 Not allowed!

PRACTICE EXERCISES

Reduce the following fractions

Multiply / Divide Fractions First common Then multiply Division is the same, with one extra step at the start: by the divide out across multiply reciprocal factors

EXAMPLES OF APPLICATION

 = 9 25 Remember: Factorize first Before reducing Then multiply across

 = 1 4 Warning: when everything divides out the result is 1, not 0

Exercises

By the end of this course You are able to : – Factorize the numerator and the denominator – Identify the common factors – Reduce the common factors – Multiply and divide fractions

Any question ?

THANKS FOR YOUR ATTENTION See you on Monday and please learn your lesson !