Question

Решить такой пример: 6 1/4 * - 3 2/3 : 1 /18 + 5 5/12 : 7/36 напишите по действиям.

Answer 1

$6 \frac{1}{4} \times ( - 3 \frac{2}{3} ) \div \frac{1}{18} + 5 \frac{5}{12} \div \frac{7}{36} = - \frac{5385}{14} \\ \\ \\ 1) \: 6 \frac{1}{4} \times ( - 3 \frac{2}{3} ) = \frac{25}{4} \times ( - \frac{11}{3} ) = - \frac{25 \times 11}{4 \times 3} = - \: \frac{275}{12} \\ \\ \\ \\ 2) \: \: \: - \: \frac{275}{12} \div \frac{1}{18} = - \: \frac{275}{12} \times \frac{18}{1} = - \: \frac{275 \times 18}{12 \times 1} = - \: \frac{275 \times 3}{2 \times 1} = - \: \frac{825}{2} \\ \\ \\ \\ 3) \: 5 \frac{5}{12} \div \frac{7}{36} = \frac{65}{12} \times \frac{36}{7} = \frac{65 \times 36}{12 \times 7} = \frac{65 \times 3}{1 \times 7} = \frac{195}{7} \\ \\ \\ \\ 4) \: \: - \: \frac{825}{2} + \frac{195}{7} = - \: \frac{825 \times 7}{2 \times 7} + \frac{195 \times 2}{7 \times2 } = \: - \: \frac{5775}{14} + \frac{390}{14} = \: - \: \frac{5775 + 390}{14} = \\ \\ \\ = \: - \: \frac{5385}{14}$
Вот снова