Question

Вычисли удобным способом:
1) 32,7*3 5/12-9 7/12*(-32,7)+32,7;
2)-14,9*2 1/7+3 1/6*(-14,9)+5 13/42*13,9.
СРОЧНО!!! Пожалуйста​

Answer 1

1)

$32.7 \times 3 \frac{5}{12} - 9 \frac{7}{12} \times ( - 32.7) + 32.7 = \\ = \frac{327}{10} \times \frac{41}{12} - \frac{115}{12} \times ( - \frac{327}{10} ) + \frac{327}{10} = \\ = \frac{109}{10} \times \frac{41}{4} + \frac{23}{4} \times \frac{109}{2} + \frac{327}{10} = \\ = \frac{4469}{40} + \frac{2507}{8} + \frac{327}{10} = \\ = \frac{2289}{5} = 457 \frac{4}{5} = 457.8$

2)

$- 14.9 \times 2 \frac{1}{7} + 3 \frac{1}{6} \times ( - 14.9) + 5 \frac{13}{42} \times 13.9 = \\ = - \frac{149}{10} \times \frac{15}{7} + \frac{19}{6} \times ( - \frac{149}{10} ) + \frac{223}{42} \times \frac{139}{10} = \\ = - \frac{149}{2} \times \frac{3}{7} - \frac{2831}{60} + \frac{30997}{420} = \\ = - \frac{447}{14} - \frac{2831}{60} + \frac{30997}{420} = - \frac{223}{42} = - 5 \frac{13}{42}$