Question

Вычислите:a)5/32*48:b)8/51*17/20:в)15:1 2/3;г)(7 1/6-2 5/8)*12:д)(1/7+2 2/3):5/7:

Answer 1

а)$frac{5}{32} *48= frac{15}{2} =7,5$
б)$frac{8}{51} * frac{17}{20} = frac{2}{15}$
в)$15/ frac{5}{3} =15* frac{3}{5} =9$
г)$(frac{43}{6} - frac{21}{8})*12 =( frac{172}{24} - frac{63}{24})*12 = frac{109}{24}*12 = frac{109}{2} =54,5$
д)$(frac{1}{7} + frac{8}{3} )/ frac{5}{7} =( frac{3}{21} + frac{56}{21} )/ frac{5}{7} = frac{59}{21} * frac{7}{5} = frac{59}{15} =3 frac{14}{15}$