SVP AIDEZ MOI ! JE DOIS RESOUDRE CES FRACTIONS EN DETAILLANT TOUTES LES ETAPES ! A = - 7/18 × (-3)/14 × (-6) B = 5/4 : 7/12 C = 5/6 × (7/2 - 1/4) D = (2/3 + 4
Mathématiques
nadinefafi
Question
SVP AIDEZ MOI ! JE DOIS RESOUDRE CES FRACTIONS EN DETAILLANT TOUTES LES ETAPES !
A = - 7/18 × (-3)/14 × (-6)
B = 5/4 : 7/12
C = 5/6 × (7/2 - 1/4)
D = (2/3 + 4/5) (3/2 - 7/8)
E = 2/3 - 5/3 × 9/10
F = 1/5 - 2/7 / 1 - 32/49
A = - 7/18 × (-3)/14 × (-6)
B = 5/4 : 7/12
C = 5/6 × (7/2 - 1/4)
D = (2/3 + 4/5) (3/2 - 7/8)
E = 2/3 - 5/3 × 9/10
F = 1/5 - 2/7 / 1 - 32/49
1 Réponse
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1. Réponse cavalier
A = - 7/18 × (-3)/14 × (-6)
= [(-7) X (-3) X (-6)] / (18 X 14)
tu réduis et tu obtiens: [ (-7) X (-3) x (-6) / (3 X 6) X (2 X 7)
= (-1) X (-1) X (-1) / 2
= -1/2
B = 5/4 : 7/12
= (5/4) X (12/ 7)
= 5 X 3/7
= 15/7
C = 5/6 × (7/2 - 1/4)
= 5/6 X (14/4 - 1/4)
= 5/6 X 13/4
= 65/24
D = (2/3 + 4/5) (3/2 - 7/8)
= (10/15 + 12/15) (12/8 - 7/8)
= 22/15 X 5/8
= 11/12
E = 2/3 - 5/3 × 9/10
= 2/3 - (3/2)
= 4/6 - 9/6
= -5/6
F = 1/5 - 2/7 / 1 - 32/49
= (7/35 -10/35)/ (49/49 -32/49)
= (-3/35) / (17/49)
= -21/85