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Sagot :

Réponse :

5) 2/3) + ..... = 1/3  ⇔ 2/3) + a = 1/3 ⇔ a = 1/3) - 2/3 = - 1/3

donc  2/3) + (- 1/3) = 1/3 ⇔ 2/3) - 1/3 = 1/3

6) 2/3) + 1 = 2/3) + 3/3 = 5/3

7) 2/3) + 2 = 2/3) + 6/3 = 8/3

8) 2/3 + 3/2 = 4/6 + 9/6 = 13/6

Explications étape par étape

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