2.398 Вычислите: в) 7⋅6+4⋅6;

в) $$7 \frac{4}{19} \cdot 6 \frac{1}{4} + 4 \frac{15}{19} \cdot 6 \frac{1}{4} = \frac{137}{19} \cdot \frac{25}{4} + \frac{91}{19} \cdot \frac{25}{4} = \frac{25}{4} \cdot \left(\frac{137}{19} + \frac{91}{19}\right) = \frac{25}{4} \cdot \frac{228}{19} = \frac{25}{4} \cdot 12 = 25 \cdot 3 = 75$$ Ответ: 75