Sagot :
Réponse :
Bjr,
D = 1 - 1/2 * 5 - 3/4
D = 1 - 5/2 - 3/4
D = 1 - 10/4 - 3/4
D = 1 - 13/4
D = -9/4
E = 1/7 + 3/7 : 2
E = 1/7 + 3/7 * 1/2
E = 1/7 + 3/14
E = 2/14 + 3/14
E = 5/14
F = (8/7 - 2) : (1 - 4/3)
F = (8/7 - 14/7) : (3/3 - 4/3)
F = -6/7 : -1/3
F = -6/7 * (-3)
F = 18/7
J'espère avoir pu vous aider
[tex]bonjour, \\\\\\D = 1 - 1/2 * 5 - 3 /4\\ = 1 - 5/2 - 3/4\\ = 4/4 - 10/4 - 3/4\\ = - 9 /4\\ = - 3 /2 \\\\\\E = 1/7 + 3/7 : 2\\ = 1/7 + 3/7 * 1/2\\ = 1/7 + 3/14\\ = 2/14 + 3/14\\ = 5/14 \\ \\\\F = ( 8 /7 - 2 ) : ( 1 - 4 /3) \\ = ( 8/7 - 14/7 ) : ( 3/3 - 4 /3)\\ = - 6 /7 : - 1 /3\\ = - 6 /7 * - 3 \\ = 18/7[/tex]