Question

1)1 3/5x7 1/2 2)2 2/9x2 19/40 3)4 1/6x1 2/5 4)1 1/5x2 11/12 5)7 5/9x1 1/17 Пжжж быстрее дам 200 балловввв

Answer 1

Ответ:

Вот все расписал наздоровье!

Answer 2

Давайте вычислим эти умножения:

1. $1\frac{3}{5} \times 7\frac{1}{2} = \left(1 + \frac{3}{5}\right) \times \left(7 + \frac{1}{2}\right) = \left(\frac{8}{5}\right) \times \left(\frac{15}{2}\right) = \frac{8 \times 15}{5 \times 2} = \frac{120}{10} = 12$.

2. $2\frac{2}{9} \times 2\frac{19}{40} = \left(2 + \frac{2}{9}\right) \times \left(2 + \frac{19}{40}\right) = \left(\frac{20}{9}\right) \times \left(\frac{79}{40}\right) = \frac{20 \times 79}{9 \times 40} = \frac{1580}{360} = \frac{79}{18} = 4\frac{7}{18}$.

3. $4\frac{1}{6} \times 1\frac{2}{5} = \left(4 + \frac{1}{6}\right) \times \left(1 + \frac{2}{5}\right) = \left(\frac{25}{6}\right) \times \left(\frac{7}{5}\right) = \frac{25 \times 7}{6 \times 5} = \frac{175}{30} = \frac{35}{6} = 5\frac{5}{6}$.

4. $1\frac{1}{5} \times 2\frac{11}{12} = \left(1 + \frac{1}{5}\right) \times \left(2 + \frac{11}{12}\right) = \left(\frac{6}{5}\right) \times \left(\frac{35}{12}\right) = \frac{6 \times 35}{5 \times 12} = \frac{210}{60} = \frac{7}{2} = 3\frac{1}{2}$.

5. $7\frac{5}{9} \times 1\frac{1}{17} = \left(7 + \frac{5}{9}\right) \times \left(1 + \frac{1}{17}\right) = \left(\frac{68}{9}\right) \times \left(\frac{18}{17}\right) = \frac{68 \times 18}{9 \times 17} = \frac{1224}{153} = \frac{8}{1} = 8$