calcule 205x195 astucieusement

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Grade: Education Subject: mathematiques
calcule 205x195 astucieusement
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Best Answer
(44)
(200+5)x(200-5) (200*200)-25=40000-25 =39975
(103)
205 * 195
= (200 + 5) (200 - 5)
= 200² - 5²
= 40 000 - 25
= 39 975