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Sagot :

Bonjour

- 4 x [- 3 - (- 3)] = - 4 x (- 3 + 3) = - 4 x 0 = 0

- 12 : [1 - (- 3)] = - 12 : (1 + 3) = - 12 : 4 = - 3

- 2 + 20/- 5 = - 2 - 4 = - 6

- 2 - 1 x (- 3) = - 2 + 3 = 1.

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