Question

Помогите решить пожалуйста ​

Answer 1

5) 2⅞ -2¾ * 2³ = 2⅞- 2 6/8 * 8 = 2 ⅛ *8 = 15/8 * 8 = 15

6)5 + 1 2/7 - 27/42 * ⅓ = 5 + 1 12/42 - 27/42 * ⅓ = 5 + 54/42 - 27/42 * ⅓ = 5 + 27/42 * ⅓ = 5 + 9/14 * 1/3 = 5 + 3/14

дальше хз

Answer 2

Ответ:

$2 \frac{7}{8} - 2 \frac{3}{4} \times {2}^{3} = 2 \frac{7}{8} - \frac{11}{4} \times 8 = 2 \frac{7}{8} - 22 = - 19 \frac{1}{8}$

$5 + 1 \frac{2}{7} - \frac{27}{42} \times \frac{1}{3} = 6 \frac{2}{7} - \frac{9}{42} = 6 \frac{12}{42} - \frac{9}{42} = 6 \frac{4}{42} = 6 \frac{2}{21}$

$3 \frac{3}{8} \times 2 \frac{1}{15} \times \frac{4}{9} \times 2 \frac{2}{3} = \\ \frac{27}{8} \times \frac{31}{15} \times \frac{4}{9} \times \frac{8}{3} = \frac{3 \times 31 \times 4}{15} =$