Question

5целых7/15-(7целых1/12-(4целых29/60-(2целых1/5-1целая5/6))) помогите пожалуйста

Answer 1

$5frac{7}{15}-( 7frac{1}{12}-(4 frac{29}{60} -(2frac{1}{5} -1 frac{5}{6})) )= 2,5$

$1) 2 frac{1}{5} -1frac{5}{6} = frac{2*5+1}{5} - frac{1*6+5}{6} = frac{11}{5} -frac{11}{6} = frac{6*11-5*11}{30} =frac{66-55}{30} = frac{11}{30}$

$2) 4frac{29}{60}- frac{11}{30} = frac{4*60+29}{60} - frac{2*11}{60} = frac{269}{60} - frac{22}{60} = frac{247}{60}$

$3) 7 frac{1}{12}- frac{247}{60}= frac{7*12+1}{12}- frac{247}{60} = frac{85}{12}- frac{247}{60} = frac{5*85 - 247}{60} = frac{425-247}{60} = frac{178}{60}$

$4) 5 frac{7}{15} - frac{178}{60} = frac{5*15+7}{15} - frac{178}{60} = frac{82}{15} - frac{178}{60} = frac{4*82-178}{60} = frac{328-178}{60}= frac{150}{60}= 2,5$