Bonsoir, es-ce que quelqu'un pourrait me calculer ces fraction en faisant les changements de dénominateur et en les écrivant svp ? Merci beaucoup d'avance !!
A = 5/9 - 2/12 + 23/18
B = 25/14 + 11/42 - 3/7
C = 9 - 8/5 - 7/2
D = 1/2 + 7/3 + 5/4 - 5/6
A = 5/9 - 2/12 + 23/18
B = 25/14 + 11/42 - 3/7
C = 9 - 8/5 - 7/2
D = 1/2 + 7/3 + 5/4 - 5/6
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Bonsoir;
A = 5/9 - 2/12 + 23/18
2/12 = 1/6
= 10/18 - 3/18 + 23/18
= 30/18 = 15/9 = 5/3
B = 25/14 + 11/42 - 3/7
= 25/14 -6/14 +11/42
= 21/14 +11/42
= 3/2 +11/42
= 63/42+11/42
= 74/42 = 37/21
C = 9 - 8/5 - 7/2
90/10-16/10- 35/10
= 39/10
D = 1/2 + 7/3 + 5/4 - 5/6
= 6/12 +28/12+15/12 -10/12
=39/12 = 13/4