Répondre :
A = (4/5 ÷ 2/3) × (1/2 − 3/4)
= (4/5 × 3/2) × (2/4 − 3/4)
= 12/10 × (2 − 3)/4
= 6/5 × (-1/4)
= -6/20
= -3/10
= (4/5 × 3/2) × (2/4 − 3/4)
= 12/10 × (2 − 3)/4
= 6/5 × (-1/4)
= -6/20
= -3/10