Ecole Supérieure de Commerce de Neuchâtel Pierre Marchal 1MPES Add & Subtract on Ecole Supérieure de Commerce de Neuchâtel Pierre Marchal http://creativecommons.org/licences/by/3.0/ Attribute to: Pierre Marchal (Lycée Jean-Piaget)

Objectives of the course By the end of the course, you should be able to: Cite and apply the sign rules for adding Cite and apply the trick for subtracting Perform any type of addition & subtraction Work comfortably with positive and negative numbers

Sign rule for adding Do the signs match ? YES NO Do the signs match ? Subtract smaller number from larger one Add the numbers Keep the sign Keep the sign of the larger number

Examples of Application

Do the signs match ? YES, signs match: YES, signs match: 1. Add numbers 1. Add numbers 2. Keep the sign 2. Keep the sign

NO : signs do not match (1) 1. Subtract smaller number from larger one 2. Keep the sign of the larger number

NO : signs do not match (2) 1. Subtract smaller number from larger one 2. Keep the sign of the larger number

Sign rule for Subtracting Trick: Change the problem to an problem By the 6  - 6  Then apply the subtraction addition adding opposite - 6 6 sign rule for addition

Examples of Application

Subtraction Exercises

PRACTICE EXERCISES

Exercises for the Addition

Exercises for the Subtraction

Exercises for the Subtraction

By the end of this course You are able to : Cite and apply the sign rules for adding Cite and apply the trick for subtracting Perform any type of addition & subtraction Work comfortably with positive and negative numbers

Any question ?

Thanks for your ATTENTION See you for the next course, please learn your lesson! Thanks for your ATTENTION