Corrigé du 7 P. 133

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Calculs :
$\dfrac{60}{100}\times 120 = 0,6\times 120 = 72$.
$\dfrac{25}{100}\times 72 = 0,25\times 72 = 18$.
$\dfrac{30}{100}\times 120 = 0,3\times 120 = 36$.
$120 - 36 = 84$.
$120 - 72 = 48$.
$36 - 18 = 18$.
$72 - 18 = 54$.
$48 - 18 = 30$.

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