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Bonjour,
50 + 1 = 51
8 x 7 = 56
56 - 51 = 5
75 x 5 = 375
375 + 9 = 384
----------------------------
50 - 8 = 42
42 / 7 = 6
6 - 1 = 5
75 x 5 = 375
375 + 9 = 384
-------------------------
8 x 7 = 56
56 - 50 = 6
6 - 1 = 5
75 x 5 = 375
375 + 9 = 384
50 + 1 = 51
8 x 7 = 56
56 - 51 = 5
75 x 5 = 375
375 + 9 = 384
----------------------------
50 - 8 = 42
42 / 7 = 6
6 - 1 = 5
75 x 5 = 375
375 + 9 = 384
-------------------------
8 x 7 = 56
56 - 50 = 6
6 - 1 = 5
75 x 5 = 375
375 + 9 = 384