Question

помогите даю 15 баллов​

Answer 1

Ответ:

1)  $\frac{3}{8} +\frac{5}{9} +\frac{5}{8} +\frac{4}{9} =\frac{8}{8} +\frac{9}{9} =1+1=2$

2) $\frac{4}{15} +\frac{3}{7} +\frac{11}{15} +\frac{6}{7} =\frac{15}{15} +\frac{9}{7} =\frac{7}{7}+\frac{9}{7}=\frac{16}{7}$

3)$5\frac{3}{8} +3\frac{5}{7} +1\frac{2}{5} +4\frac{5}{8} =9\frac{8}{8} +3+1+\frac{25}{35}+\frac{14}{35} =14\frac{39}{35}$

1) $0.5-\frac{2}{7} =\frac{5}{10} -\frac{2}{7} =\frac{35}{70} -\frac{10}{35} =\frac{25}{35}$

2)$0.53+\frac{5}{16} =\frac{53}{100} +\frac{5}{16} =\frac{848+500}{1600} =\frac{1348}{1600}=\frac{337}{400}$

3)$8\frac{11}{24} -5.35=8\frac{11}{24}- 5\frac{35}{100} =8\frac{11}{24}- 5\frac{7}{20}=8\frac{55}{120}- 5\frac{42}{120}=3\frac{13}{120}$

4)$6.625-3\frac{6}{17} =6\frac{625}{1000}- 3\frac{6}{17}=6\frac{5}{8}-3\frac{6}{17}=6\frac{85}{136} -3\frac{48}{136} =3\frac{37}{136}$

$\frac{1}{7} +\frac{1}{5} =\frac{12}{35} \\\frac{35}{35} -\frac{12}{35}=\frac{23}{35}$

Осталось вырыть 23/35  часть траншеи