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Sagot :

On met les fractions au même dénominateur.

5/2 - 3/7

= 35/14 - 6/14

= 29/14

- 3/4 - 5/8

= - 6/8 - 5/8

= -11/8

7/5 - 1.5

= 7/5 - 3/2

= 14/10 - 15/10

= -1/10

-9 - 4/7

= -9/1 - 4/7

= - 63/7 - 4/7

= -67/7

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