Question

(-1 supra 10+ 2 supra 15)×(-7 intregi si 1 supra 2)×(-4)×(-7 supra 20+4 supra 15)

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Answer 1

Răspuns:

$( - \frac{1}{10} + \frac{2}{15}) \times ( - 7 \frac{1}{2} ) \times ( - 4) \times ( - \frac{7}{20} + \frac{4}{15} ) =$

$( \frac{( - 3 + 4)}{30} ) \times ( - \frac{15}{2} ) \times ( - 4) \times ( \frac{( - 21 + 16)}{60} ) =$

$\frac{1}{30} \times 30 \times ( - \frac{1}{12} ) =$

$- \frac{1}{12}$