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Sagot :

Bonsoir,

[tex] \frac{11}{45} - \frac{5}{18} = \frac{11 \times 2}{45 \times 2} - \frac{5 \times 5}{18 \times 5} = \frac{22}{90} - \frac{25}{90} = - \frac{3}{90} = - \frac{3 \times 1}{3 \times 30} = - \frac{1}{30} [/tex]

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