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NoixDeCoco2105
@NoixDeCoco2105
May 2019
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Bonjour à tous
qui aurait la gentillesse de me consacrer 5 mn pour mon devoir svp, je vous remercie
d'avance,
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totolekoala
Verified answer
Bonjour,
A = -7 -3x (-7/4) = -7 +21/4 = (-28+21)/4 = -7/4
B = 4 + (-3+ 6/(-5) ) = 4 + ( (15 + 6) / (-5) ) = 4 - 21/5 = (20-21)/5 = -1/5
C = 17 - 5²x (-4+3x2) = 17 - 5²x (-4+6) = 17 - 5²x (2) = 17 - 25x2 = 17-50 = -33
D= (3x4+10)/(-7-3*(-2.5) ) = (12+10) / (-7 +7.5) = 22/0.5 = 44
E = -8 - 3x(1.2-2) = -8 - 3x(-0.8) = -8 + 2.4 = -5.6
F = -4 - ( -0.3 + 4x(2+0.5x3)-2)-1 = -4 - ( -0.3 + 4x(2+1.5)-2)-1=-4 - ( -0.3 + 4x3.5-2)-1 = -4 - ( -0.3 + 14-2)-1 = -4 - ( 11.7)-1 = -16.7
D est l'intrus car c'est le seul nombre positif.
Pour revoir (du plus simple au plus dur) les bases sur les nombres relatifs et la priorité des opérateurs, je te conseille : https://www.youtube.com/playlist?list=PLcRC5bLaHLUv75mC0xt3gI3MiZivg9Kk6
bonne journée,
T.
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Verified answer
Bonjour,A = -7 -3x (-7/4) = -7 +21/4 = (-28+21)/4 = -7/4
B = 4 + (-3+ 6/(-5) ) = 4 + ( (15 + 6) / (-5) ) = 4 - 21/5 = (20-21)/5 = -1/5
C = 17 - 5²x (-4+3x2) = 17 - 5²x (-4+6) = 17 - 5²x (2) = 17 - 25x2 = 17-50 = -33
D= (3x4+10)/(-7-3*(-2.5) ) = (12+10) / (-7 +7.5) = 22/0.5 = 44
E = -8 - 3x(1.2-2) = -8 - 3x(-0.8) = -8 + 2.4 = -5.6
F = -4 - ( -0.3 + 4x(2+0.5x3)-2)-1 = -4 - ( -0.3 + 4x(2+1.5)-2)-1=-4 - ( -0.3 + 4x3.5-2)-1 = -4 - ( -0.3 + 14-2)-1 = -4 - ( 11.7)-1 = -16.7
D est l'intrus car c'est le seul nombre positif.
Pour revoir (du plus simple au plus dur) les bases sur les nombres relatifs et la priorité des opérateurs, je te conseille : https://www.youtube.com/playlist?list=PLcRC5bLaHLUv75mC0xt3gI3MiZivg9Kk6
bonne journée,
T.