Bonjour/Bonsoir, s'il vous plait pourriez vous effectuer les calculs suivants parce que je n'y comprends rien du tout :1°) 15h 12 min 29s + 4h 43 min 40|| 2°) 5j 18h 33 min + 2j 9h 27 min||3°) 15h 40 min 29s – 4 h 13 min 40 s|| 4°) 9h 38min 23s – 6h 43min 55 s
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