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Mathématique 216

Mathématique 216. Note pour le quiz de 5% le 6 septembre. 1 3. 2 3. 1) 33 % = 1/3 2) 66 % = 2/3. Mettre en fraction. 1) 33 x 3+1 3 2) 100 3. %. 100 1. = 100 1 1 3 100 3. ÷. x =.

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Mathématique 216

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  1. Mathématique 216 Note pour le quiz de 5% le 6 septembre..

  2. 1 3 2 3 1) 33 % = 1/3 2) 66 % = 2/3 Mettre en fraction 1) 33 x 3+1 3 2) 100 3 % 100 1 = 100 1 1 3 100 3 ÷ x =

  3. 15 % de 120$ = _______ 15% x 120$= _______ 15% = 10% + 5% 10% de 120 $ = 10% x 120$ = 12$ 5% de 120$ = moitié de 10% de 120$...= 12$÷2 = 6$ 12$ + 6$ = 18$ 15% de 120$ = 18$

  4. Priorité d’opération • 1) Parenthèses • 2) Exponentation • 3) X et ÷ • 4) Addition et soustraction Truc pour retenir … PEXA -_______-

  5. Propriétés des opérations • 1) Distributivité de la……. multiplication sur l’addition a x (b + c ) = a x b + a x c multiplication sur la soustraction a x (b-c) = a x b – a x c division sur l’addition a ÷ ( b+c ) = a ÷ b + a ÷ c division sur la soustraction a ÷ (b-c ) = a ÷ b - a ÷c

  6. Propriétés des opérations • 2) Commutativité de .. -l’addition a + b = b+ a - la multiplication a x b = b x a

  7. Propriétés des opérations • Associativité … - de l’addition (a+ b ) + c = a+ (b+ c) - de la multiplication (a x b ) x c = a x ( b x c ) • Élément absorbant = 0 x 40398403298 =0 • Élément neutre = 1x2=2 1x3=3…

  8. Ensemble de nombre • Nombre carré CP={0,1,4,9,16,25,36…} • Multiple d’un nombre ex: multiple de 2… M(2)={0,2,4,6,8,10…}

  9. Ensemble de nombre • Ensemble de nombre premiers IP={ 2,3,5,6,11,13,17…} 1 n’est PAS un nombre premiers • Nombre naturel IN ={ 0,1,2,3,4,5,6…} ( ne pas oublier le 0) • Nombre entier Z= {…,-3,-2,-1,0,1,2,3…}

  10. -5 = -(5x5)= -25 • (-5) = (-5) x (-5) = 25 2 2

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