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Sagot :

Bjr,

5/12 - 11/8 + 5/6 = 10/24 - 33/24 + 20/24 = -3/24.

-27/10 * 25/-18 = (-27 * 25)/(10 * -18) = -675/-180 = 675/180 = à réduire

2/3 - 10/3 : 5/4 = 2/3 - 10/3 * 4/5 = 2/3 - 40/15 = 10/15 - 40/15 = -30/15 = -2.

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