bonjour j ai un exo de maths et j arrive pas A)1sur2×(-2sur3) B)-2sur6×11sur5 C)-4sur5×(-7sur2) D)(-7)×(-9sur56) E)3sur14×(-7sur3) F)(-5sur7)au carre c un peti
Mathématiques
lizapoup
Question
bonjour j ai un exo de maths et j arrive pas
A)1sur2×(-2sur3)
B)-2sur6×11sur5
C)-4sur5×(-7sur2)
D)(-7)×(-9sur56)
E)3sur14×(-7sur3)
F)(-5sur7)au carre c un petit 2
merci d avance de vos reponses
(10points)
A)1sur2×(-2sur3)
B)-2sur6×11sur5
C)-4sur5×(-7sur2)
D)(-7)×(-9sur56)
E)3sur14×(-7sur3)
F)(-5sur7)au carre c un petit 2
merci d avance de vos reponses
(10points)
1 Réponse
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1. Réponse maudmarine
A) 1/2 × -2/3 = -3/6 = -1 x 3 / 2 x 3 = -1/2
B) -2/6 × 11/5 = -22/30 = - 2 x 11 / 2 x 15 = -11/15
C) -4/5 × (-7/2) = 28/10 = 2 x 14 / 2 x 5 = 14/5
D) (-7) × (-9/56) = 63/56 = 9 x 7 / 9 x 6 = 7/6
E) 3/14 × (-7/3) = -21/42 = -21 x 1 / 21 x 2 = -1/2
F) (-5/7)² = -5/7 x -5/7 = 25/49