Question

Помогите пожалуйста даю 100балов, напишите пожалуйста с решением

Answer 1

$1. (7 - 1 \frac{5}{9} \div \frac{7}{24} ) \div \frac{20}{27} \\ (7 - \frac{14}{9} \times \frac{24}{7} ) \times \frac{27}{20} = \\ (7 - \frac{16}{3} ) \times \frac{27}{20} = \\ \frac{5}{3} \times \frac{27}{20} = \frac{9}{4} = 2.25$

$2. \frac{2}{3} + 3 \frac{3}{5} \times ( \frac{7}{27} - \frac{5}{18} ) - \frac{9}{10} \\ \frac{2}{3} + \frac{18}{5} \times ( - \frac{1}{54} ) - \frac{9}{10} = \\ \frac{2}{3} - \frac{1}{5} \times \frac{1}{3} - \frac{9}{10} = \\ \frac{2}{3} - \frac{1}{15} - \frac{9}{10} = - \frac{3}{10} = - 0.3$

$4 \frac{1}{3} \times 5 + 2.4 \div ( - 0.1) - \frac{14}{15} \div 1 \frac{2}{5} \\ \frac{13}{3} \times 5 + \frac{12}{5} \times ( - 10) - \frac{14}{15} \times \frac{5}{7} = \\ \frac{65}{3} + ( - 24) - \frac{2}{3} = - 3$

Answer 2

Пошаговое объяснение:

№1

1) 1 5/9 : 7/24 = 14/9 * 24/7 = 2/3 * 8/1 = 16/3 = 5 1/3

2) 7 - 5 1/3 = 6 3/3 - 5 1/3 = 1 2/3

3) 1 2/3 : 20/27 = 5/3 * 27/20 = 1/1 * 9/4 = 9/4 = 2 1/4

№2

1) 7/27 - 5/18 = 14/54 - 15/54 = -1/54

2) 3 3/5 * (-1/54) = 18/5 * (-1/54) = 1/5 * (-1/3) = -1/15

3) 2/3 + (-1/15) = 10/15 - 1/15 = 9/15

4) 9/15 - 9/10 = 18/30 - 27/30 = -9/30 = -3/10

№3

1) 4 1/3 * 5 = 13/3 * 5 = 65/3 = 21 2/3

2) 2,4 : (-0,1) = -24

3) 14/15 : 1 2/5 = 14/15 : 7/5 = 14/15 * 5/7 = 2/3 * 1/1 = 2/3

4) 21 2/3 + (-24) = 21 2/3 - 23 3/3 = -2 1/3

5) -2 1/3 - 2/3 = -2 3/3 = -3