Question

Пожалуйста помогите. Срочно

Answer 1

Ответ:

$a)6\frac{11}{18} +2\frac{7}{12} =6\frac{22}{36} +2\frac{21}{36} =8\frac{43}{18} =9\frac{5}{36} \\ \\ b)7\frac{1}{26}-5\frac{8}{39} = 7\frac{3}{78}-5\frac{16}{78}=6\frac{81}{78}-5\frac{16}{78} =1\frac{65}{78} \\ \\ 10\frac{3}{7} -(4\frac{1}{6}+3\frac{2}{21})=10\frac{18}{42} -(4\frac{7}{42}+3\frac{4}{42})=10\frac{18}{42}-7\frac{11}{42} =3\frac{7}{42} =3\frac{1}{6}$

$3\frac{7}{9} +1,375-1\frac{7}{12}=3\frac{28}{36} +1\frac{375}{1000} - 1\frac{21}{36} =2\frac{7}{36} +1\frac{3}{8} =2\frac{14}{72} +1\frac{27}{72} =3\frac{41}{72}$

Пошаговое объяснение:

$a)\\ (x-1\frac{7}{9} )+2\frac{1}{12}=3\frac{3}{4} \\ \\ x-1\frac{28}{36}+2\frac{3}{36} =3\frac{27}{36} \\ \\ x=3\frac{27}{36} +1\frac{28}{36} -2\frac{3}{36} \\ \\ x=2\frac{52}{36}\\ \\ x=3\frac{16}{36} =3\frac{4}{9} \\ \\ b)\\ 6\frac{5}{6} -(2\frac{7}{8}-x)=5,375\\ \\ 6\frac{20}{24} -2\frac{21}{24} +x=5\frac{375}{1000} \\ \\ 6\frac{20}{24} -2\frac{21}{24} +x=5\frac{3}{8}\\ \\ x=5\frac{9}{24}+2\frac{21}{24}-6\frac{20}{24} \\ \\ x=1\frac{10}{24}\\ \\ x=1\frac{5}{12}$