Bonjour, merci de bien vouloir m'aider ...
A = 7x8+9x(-9)+3
B = 7x8+9x(-9+3)
C = (-48)÷4-6÷2
D = (1 4) 6 E = 1 15 1
- + - x - - _ - x -
(2 3) 5 9 9 6
F = (-3 1) (2 5)
- + - ÷ - _ -
(4 2) (5 2)
A = 7*8+9*(-9)+3
= 56 - 81 + 3
= -22
B = 7*8+9*(-9+3)
= 56 + 9*(-6)
= 56 - 54
= 2
C = (-48)/4 - 6/2
= -12 - 3
= -15
D = (1/2 + 4/3)*6/5
= (3/6 + 8/6)*6/5
= (11/6) * 6/5
= 11/5
E = 1/9 - 15/9 *1/6
= 1/9 - 15/54
= 2/18 - 5/18
= -3/18
= -1/6
F = (-3/4 +1/2) / (2/5 - 5/2)
= (-3/4 + 2/4) / (4/10 - 25/10)
= (-1/4) / (-21/10)
= (-1/4) * (-10/21)
= 5/42
En espérant t'avoir aidé.
