Sans calculatrice et sans poser d'opérations, calcule de 2 façons différentes : 

 

201² - 199²

By: USER3137
27 Agustus 2025 mathematiques 5 minutes
4.5
115 views 115 comments 13 shares

Question

Grade: Education Subject: mathematiques

Sans calculatrice et sans poser d'opérations, calcule de 2 façons différentes : 

 

201² - 199²

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115 Viewed 115 Answers

Answer (115)

Best Answer
(216)

Bonjour,

 

Factorise :

[tex](201-199)(201+199) = 2 \times 400 = 800[/tex]

Ou sinon :

[tex](200+1)^2-(200-1)^2 = (40000+400+4)-(40000-400+4\\= 800 [/tex]

Answered on 27 Agustus 2025

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