Réponse :
bonjour
A=-3/10+(-1/4)=-12/40+(-10/40)=-12/40-10/40=-22/40=-11/20
B =-5/4-(-7/6)=-30/24-(-28/24)= -30/24+28/24=-2/24=-1/12
C=-3/2-5/-6-(-4/-9)=-27/18-(-15/18)-8/18=-27/18+15/18-8/18=-20/18=-10/9
Explications étape par étape
Bonjour,
A = - 3/10 + - 1/4
A = - 3/10 - 1/4
A = (- 3 x 4) / (10 x 4) - (1 x 10) / (4 x 10)
A = - 12/40 - 10/40
A = - 22/40
A = (2 x - 11) / (2 x 20)
A = - 11/20
B = - 5/4 - - 7/6
B = - 5/4 + 7/6
B = (- 5 x 3) / (4 x 3) + (7 x 2) / (6 x 2)
B = - 15/12 + 14/12
B = - 1/12
C = - 3/2 - 5/- 6 - - 4/- 9
C = - 3/2 + 5/6 - 4/9
C = (- 3 x 9) / (2 x 9) + (5 x 3) / (6 x 3) - (4 x 2) / (9 x 2)
C = - 27/18 + 15/18 - 8/18
C = - 35/18 + 15/18
C = - 20/18
C = (2 x - 10) / (2 x 9)
C = - 10/9.
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Verified answer
Réponse :
bonjour
A=-3/10+(-1/4)=-12/40+(-10/40)=-12/40-10/40=-22/40=-11/20
B =-5/4-(-7/6)=-30/24-(-28/24)= -30/24+28/24=-2/24=-1/12
C=-3/2-5/-6-(-4/-9)=-27/18-(-15/18)-8/18=-27/18+15/18-8/18=-20/18=-10/9
Explications étape par étape
Verified answer
Bonjour,
A = - 3/10 + - 1/4
A = - 3/10 - 1/4
A = (- 3 x 4) / (10 x 4) - (1 x 10) / (4 x 10)
A = - 12/40 - 10/40
A = - 22/40
A = (2 x - 11) / (2 x 20)
A = - 11/20
B = - 5/4 - - 7/6
B = - 5/4 + 7/6
B = (- 5 x 3) / (4 x 3) + (7 x 2) / (6 x 2)
B = - 15/12 + 14/12
B = - 1/12
C = - 3/2 - 5/- 6 - - 4/- 9
C = - 3/2 + 5/6 - 4/9
C = (- 3 x 9) / (2 x 9) + (5 x 3) / (6 x 3) - (4 x 2) / (9 x 2)
C = - 27/18 + 15/18 - 8/18
C = - 35/18 + 15/18
C = - 20/18
C = (2 x - 10) / (2 x 9)
C = - 10/9.