Question

Решить пример по действиям. 6 1/4 * 8 - 3 2/3 : 1/18 + 5 5/12 : 7/36

Answer 1

$6 \frac{1}{4} \times 8 - 3 \frac{2}{3} \div \frac{1}{18} + 5 \frac{5}{12} \div \frac{7}{36} = \frac{125}{7} \\ \\ \\ \\ 1) \: 6 \frac{1}{4} \times 8 = \frac{25}{4} \times 8 = \frac{25 \times 8}{4 \times 1} = \frac{25 \times 2}{1 \times 1} = \frac{50}{1} = 50 \\ \\ \\ \\ 2) \: \: 3 \frac{2}{3} \div \frac{1}{18} = \frac{11}{3} \times \frac{18}{1} = \frac{11 \times 18}{3 \times 1} = \frac{11 \times 6}{1 \times 1} = \frac{66}{1} = 66 \\ \\ \\ \\ \: \: 3) \: \: 5 \frac{5}{12} \div \frac{7}{36} = \frac{65}{12} \times \frac{36}{7} = \frac{65 \times 36}{12 \times 7} = \frac{65 \times 3}{1 \times 7} = \frac{195}{7} \\ \\ \\ \\ 4) \: \: 50 - 60 = - \: 10 \\ \\ \\ 5) \: \: - 10 + \frac{195}{7} = - \frac{10 \times7 }{1 \times 7} + \frac{195}{7} = - \frac{70}{7} + \frac{195}{7} = \frac{125}{7}$

$otvet : \frac{125}{7}$

Вот

Посмотри я тебе второй пример