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Meilleure réponse !
2014-03-29T15:55:55+01:00


Exercice 36:

a) 4 - 3/2

= 4x2 / 1x2 - 3/2

= 8/2 - 3/2

= 5/2


b) 2 - 1/3

= 2x3 / 1x3 - 1/3

= 6/3 - 1/3

= 5/3


c) 9/4 - 1

= 9/4 - 1x4 / 1x4

= 9/4 - 4/4

= 5/4


d) 7 + 1/4

= 7x4 / 1x4 + 1/4

= 28/4 + 1/4

= 29/4


e) 16/3 - 3

= 16/3 - 3x3 / 1x3

= 16/3 - 9/3

= 7/3


f) 4 + 5/7

= 4x7 / 1x7 + 5/7

= 28/7 + 5/7

= 33/7


g) 6 - 5/3 - 5/6

= 6x6 / 1x6 - 5x2 / 3x2 - 5/6

= 36/6 - 10/6 - 5/6

= 26/6 - 5/6

= 21/6

= 7/2


h) 2 + 3/4 + 7/2

= 2x4 / 1x4 + 3/4 + 7x2 / 2x2

= 8/4 + 3/4 + 14/4

= 11/4 + 14/4

= 25/4


i) 7 - 9/5 - 13/25

= 7x25 / 1x25 - 9x5 / 5x5 - 13/25

= 175/25 - 45/25 - 13/25

= 130/25 - 13/25

= 117/25