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Sagot :

Bonjour

Calculer et donner chaque résultat sous forme d une fraction irréductible :

D=14/5 - 7/20 + -1-/6

D = (14 x 12) / (5 x 12) - (7 x 3) / (20 x 3) + (1 x 10) / (6 x 10)

D = 168/60 - 21/60 + 10/60

D = 157/60

E=-5/8 - 5/24 + -5/12

E = (- 5 x 6) / (8 x 6) - (5 x 2) / (24 x 2) - (5 x 4) / (12 x 4)

E = - 30/48 - 10/48 - 20/48

E = - 60/48

E = (12 x - 5) / (12 x 4)

E = - 5/4.

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