Răspuns :
Răspuns:
[tex]15( \frac{1}{2} - \frac{6}{9} + \frac{6}{10} ) + 7 = \\ 15( \frac{1}{2} + \frac{2}{3} + \frac{3}{5} ) + 7 = 15 \frac{15 - 20 + 18}{30} + 7 = \frac{1}{2} \times 13 + 7 = (13 + 14) \frac{1}{2 } = \\ \frac{27}{2} [/tex]
Răspuns:
[tex]15( \frac{1}{2} - \frac{6}{9} + \frac{6}{10} ) + 7 = \\ 15( \frac{1}{2} + \frac{2}{3} + \frac{3}{5} ) + 7 = 15 \frac{15 - 20 + 18}{30} + 7 = \frac{1}{2} \times 13 + 7 = (13 + 14) \frac{1}{2 } = \\ \frac{27}{2} [/tex]