bonjour, je dois arrondir les résultats à l’unité près. pouvez-vous m’aider s’il vous plaît ?

Réponse :

A = -13/8 + 7/16

A = -26/16 + 7/16

A = -26 + 7/16

A = -19/16

B = (3/10 - 2/5) x 1/2

B = (3/10 - 4/10) x 1/2

B = (3 - 4/10) x 1/2

B = -1/10 x 1/2

B = -1 x 1/10 x 2

B = -1/20

C = 7/4 ÷ 5/2

C = 7/4 x 2/5

C = 7 x 2/4 x 5

C = 14/20

C = 7/10

D = 5 - 3 x (-5)²

D = 5 - 3 x 25

D = 5 - 75

D = -70

E = (1/8 - 7/12) ÷ (7/6 + 7/16)

E = (3/24 - 14/24) ÷ (56/48 + 21/48)

E = -11/24 ÷ 77/48

E = -11/24 x 48/77

E = -528/1848

E = -2/7