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)

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