Question

помогите буду очень благодарен, очень нужно!​

Answer 1

Ответ:

1) 5/21

2) 2/5

3) 1/5

4)38/7=5|3/7

5) 1,5

6) 2/11

7) 3/40

8) 5/18

Answer 2

Ответ:

1)

${( \frac{5}{7}) }^{2} \times \frac{7}{15} = \frac{ {5}^{2} }{ {7}^{2} } \times \frac{7}{15} = \frac{25}{49} \times \frac{7}{15} = \frac{5}{21}$

2)

${( \frac{3}{4}) }^{2} \times \frac{32}{45} = \frac{ {3}^{2} }{ {4}^{2} } \times \frac{32}{45} = \frac{9}{16} \times \frac{32}{45} = \frac{2}{5}$

3)

${( \frac{1}{2} )}^{2} \times \frac{4}{5} = \frac{ {1}^{2} }{ {2}^{2} } \times \frac{4}{5} = \frac{1}{4} \times \frac{4}{5} = \frac{1}{5}$

4)

${(2 \frac{5}{7}) }^{2} \times \frac{14}{19} = { (\frac{7 \times 2 + 5}{7} )}^{2} \times \frac{14}{19} = \\ { (\frac{19}{7}) }^{2} \times \frac{14}{19} = \frac{ {19}^{2} }{ {7}^{2} } \times \frac{14}{19} = \\ \frac{361}{49} \times \frac{14}{19} = \frac{38}{7} = 5 \frac{3}{7}$

5)

${(2 \frac{1}{3} )}^{2} \times \frac{27}{98} = {( \frac{3 \times 2 + 1}{3} )}^{2} \times \frac{27}{98} = \\ {( \frac{7}{3} )}^{2} \times \frac{27}{98} = \frac{ {7}^{2} }{ {3}^{2} } \times \frac{27}{98} = \\ \frac{49}{9} \times \frac{27}{98} = \frac{3}{2} = 1 \frac{1}{2}$

6)

${( \frac{8}{11} )}^{2} \times \frac{11}{32} = \frac{ {8}^{2} }{ {11}^{2} } \times \frac{11}{32} = \\ \frac{64}{121} \times \frac{11}{32} = \frac{2}{11}$

7)

${( \frac{3}{10}) }^{2} \times \frac{5}{6} = \frac{ {3}^{2} }{ {10}^{2} } \times \frac{5}{6} = \frac{9}{100} \times \frac{5}{6} = \frac{3}{40}$

8)

${( \frac{2}{3} )}^{2} \times \frac{15}{24} = \frac{ {2}^{2} }{ {3}^{2} } \times \frac{15}{24} = \frac{4}{9} \times \frac{15}{24} = \frac{5}{18}$