№2 Вычислите! a)-7+9 07-12-11 61-17-(-11) 2)暑・(一) g) 12% (-99) e) - 음+

• а) -7 + 9 = 2
• 0) -12 - 11 = -23
• 61) -17 - (-11) = -17 + 11 = -6
• 2) \(\frac{13}{9} \) ⋅ (- \(\frac{18}{13}\)) = \(\frac{13}{9} \) ⋅ (\(\frac{-18}{13}\)) = - \(\frac{13 ⋅ 18}{9 ⋅ 13}\) = - \(\frac{18}{9}\) = -2
• g) 4 \(\frac{2}{3}\); (-0,9) = \(\frac{4*3+2}{3}\) : (-0.9) = \(\frac{14}{3}\) : (- \(\frac{9}{10}\)) = \(\frac{14}{3}\) * (\(\frac{-10}{9}\)) = - \(\frac{140}{27}\) = -5 \(\frac{5}{27}\)
• e) - \(\frac{3}{1}\) + \(\frac{4}{3}\) = -3 + \(\frac{4}{3}\) = \(\frac{-9+4}{3}\) = - \(\frac{5}{3}\) = -1 \(\frac{2}{3}\)

Ответ: a) 2; 0) -23; 61) -6; 2) -2; g) -5 \(\frac{5}{27}\); e) -1 \(\frac{2}{3}\)