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Sagot :

Bonjour,

a)

4/7 -9/7 = -5/7

b)

8/5 -11/5 = -3/5

-11/7 +5/7 =  -6/7

-3/4+ (-5/4) = -8/4 = -2

Bonjour

Réponse :

a. quatre septièmes = 4/7   ;    moins neuf septième = -9/7

4/7-9/7 = -5/7

b. 8/5-11/5 = 8-11/5 = -3/5

  -11/7+5/7 =  -11+5/7 = -6/7

  -3/4+(-5/4) = -3/4-5/4 = -3-5/4 = -8/4

Bonne journée :)

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