a) 120 - 32 - 25 - 33 = 30
Eva a ramassé 30 coquillages.
b)
- Eva : [tex]\dfrac{30}{120} = \dfrac{30 \times 1}{30 \times 4} = \dfrac{1}{4}[/tex]
- Sonia : [tex]\dfrac{32}{120} = \dfrac{8 \times 4}{8 \times 15} = \dfrac{4}{15}[/tex]
- Paul :[tex]\dfrac{25}{120} = \dfrac{5 \times 5}{5 \times 24} = \dfrac{5}{24}[/tex]
- Enzo : [tex]\dfrac{33}{120} = \dfrac{3 \times 11}{3 \times 40} = \dfrac{11}{40}[/tex]
