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Sagot :

Bonjour,

Par étape:

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

5/6 +4/9 = 45/54 + 24/ 54 = 69/54 = 23/ 18

23/18 + (-5/6) = 23/18 -5/6 = 23/18 -15/18 = 8/18 = 4/9

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