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Sagot :

Réponse :

Bonjour il te suffit de mettre les fractions sur le même dénominateur tout simplement :)  

Explications étape par étape

19/12 - 3/2

= 19/12 - (3/2)*6

= 19/12 - 18/12

= 1/12

11/9 - 2/3

= 11/9 - (2/3)*3

= 11/9 - 6/9

= 5/9

7/5 + 11/10

= (7/5)*2 + 11/10

= 14/10 + 11/10

= 25/10

= 5/2

10/13 - 11/26

= (10/13)*2 - 11/26

= 20/26 - 11/26

= 9/26

2 + 5/3

= 2/1 + 5/3

= (2/1)*3 + 5/3

= 6/3 + 5/3

= 11/3

22/7 - 3

= 22/7 - 3/1

= 22/7 - (3/1)*7

= 22/7 - 21/7

= 1/7

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