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Sagot :

0.95 x 105.3 - 0.95 x 5.3 = 0,95 x (105,3 - 5,3)  (Tu factorises par 0,95)
0,95 x (105,3 - 5,3) = 0,95 x 100 = 95
= 0.95 x 105.3 - 0.95 x 5.3 
= 100,035 - 5,035
= 95

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