bonjour, j'au exercice de math urgent à rendre pour demain de niveau 4 éme pouvez vous m'aider:.... Pergunta de ideia deJASMINE20031

JASMINE20031 @JASMINE20031

January 2021 1 90 Report

bonjour, j'au exercice de math urgent à rendre pour demain de niveau 4 éme
pouvez vous m'aider:

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Bonjour,

A = 2/3 - 7/3 x 8/21
A = 2/3 - 56/63
A = 2 x 21 / 3 x 21 - 56/63
A = 42/63 - 56/63
A = 7 x 2 / 7 x - 9
A = - 2/9

B = (3/4 - 5/6) x 3/2
B = (3 x 3 / 4 x 3 - 5 x 2 / 6 x 2) x 3/2
B = (9/12 - 10/12) x 3/2
B = - 1/12 x 3/2
B = - 3/24
B = 3 x - 1 / 3 x 8
B = - 1/8

C = 11 : (2/3 - 5/2)
C = 11 : (2 x 2 / 3 x 2 - 5 x 3 / 2 x 3)
C = 11 : (4/6 - 15/6)
C = 11 : - 11/6
C = 11 x - 6/11
C = - 66/11
C = 11 x - 6 / 11 x 1
C = - 6

D = 3/7 - 15/7 : 5/24
D = 3/7 - 15/7 x 24/5
D = 3/7 - 360/35
D = 3 x 5 / 7 x 5 - 360/35
D = 15/35 - 360/35
D = - 345/35
D = 5 x - 69 / 5 x 7
D = - 69/7

E = (11/7 - 2/5) x 24/7
E = (11 x 5 / 7 x 5 - 2 x 7 / 5 x 7) x 24/7
E = (55/35 - 14/35) x 24/7
E = 41/35 x 24/7
E = 984/245

F = 25/15 x (1/18 + 1/24)
F = 25/15 x (1 x 4 / 18 x 4 + 1 x 3 / 24 x 3)
F = 25/15 x (4/72 + 3/72)
F = 25/15 x 7/72
F = 175/1080
F = 5 x 35 / 5 x 216
F = 35/216.

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JASMINE20031 merci beaucoup