A = 2/9 - 3/4 x 5/2 A = 2/9 - 15/8 A = 2 x 8 / 9 x 8 - 15 x 9 / 8 x 9 A = 16/72 - 135/72 A = - 119/72
B = (2/9 - 3/4) x 5/2 B = (2 x 4 / 9 x 4 - 3 x 9 / 4 x 9) x 5/2 B = (8/36 - 27/36) x 5/2 B = - 19/36 x 5/2 B = - 95/72
C = 2/9 - 3/4 : 5/2 C = 2/9 - 3/4 x 2/5 C = 2/9 - 6/20 C = 2 x 20 / 9 x 20 - 6 x 9 / 20 x 9 C = 40/180 - 54/180 C = - 14/180 C = 2 x - 7 / 2 x 90 C = - 7/90
D = (2/9 - 3/4) : 5/2 D = (2 x 4 / 9 x 4 - 3 x 9 / 4 x 9) : 5/2 D = (8/36 - 27/36) : 5/2 D = - 19/36 x 2/5 D = - 38/180 D = 2 x - 19 / 2 x 90 D = - 19/90
2)
A + B + C + D = - 119/72 - 95/72 - 14/180 - 38/180 = - 119 x 2,5 / 72 x 2,5 - 95 x 2,5 / 72 x 2,5 - 52/180 = - 297,5/180 - 237,5/180 - 52/180 = - 535/180 - 52/180 = - 587/180
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Bonjour,1)
A = 2/9 - 3/4 x 5/2
A = 2/9 - 15/8
A = 2 x 8 / 9 x 8 - 15 x 9 / 8 x 9
A = 16/72 - 135/72
A = - 119/72
B = (2/9 - 3/4) x 5/2
B = (2 x 4 / 9 x 4 - 3 x 9 / 4 x 9) x 5/2
B = (8/36 - 27/36) x 5/2
B = - 19/36 x 5/2
B = - 95/72
C = 2/9 - 3/4 : 5/2
C = 2/9 - 3/4 x 2/5
C = 2/9 - 6/20
C = 2 x 20 / 9 x 20 - 6 x 9 / 20 x 9
C = 40/180 - 54/180
C = - 14/180
C = 2 x - 7 / 2 x 90
C = - 7/90
D = (2/9 - 3/4) : 5/2
D = (2 x 4 / 9 x 4 - 3 x 9 / 4 x 9) : 5/2
D = (8/36 - 27/36) : 5/2
D = - 19/36 x 2/5
D = - 38/180
D = 2 x - 19 / 2 x 90
D = - 19/90
2)
A + B + C + D
= - 119/72 - 95/72 - 14/180 - 38/180
= - 119 x 2,5 / 72 x 2,5 - 95 x 2,5 / 72 x 2,5 - 52/180
= - 297,5/180 - 237,5/180 - 52/180
= - 535/180 - 52/180
= - 587/180