KHALILNADIR356 KHALILNADIR356 18-10-2022 Mathématiques Answered Exercice n°4: Calculer : • A = (-21)+(-7) + (+38) - (-9) =B=(-5)-(-4) + (+3) − (+2) =C = (+9) + (-15) - (-7) - (+5) • D= (-6) + (-3) - (-5) + (+10)=
