Question

упростите выражение (3.5 - 2целых 5/6) : 4 - 1.3​

Answer 1

Ответ:

$(3,5 - 2\frac{5}{6}) : 4 - 1,3=3\frac{1}{2} - 2\frac{5}{6} : 4 - 1,3 = 3\frac{3}{6} - 2\frac{5}{6} : 4 - 1,3=\frac{4}{6} : 4 - 1,3 =\frac{4*1}{6*4} - 1,3 =\frac{1}{6} - \frac{13}{10} =\frac{5-39}{30} = -\frac{34}{30} = -1\frac{4}{30} = -1\frac{2}{15}$

Answer 2

$\displaystyle \tt \bigg(3,5-2\frac{5}{6}\bigg):4-1,3=-1\frac{2}{15} \\\\\\1). \ \ 3,5-2\frac{5}{6}=\frac{35}{10}-\frac{17}{6}=\frac{105-85}{30}=\frac{2}{3};\\\\2). \ \ \frac{2}{3}:4=\frac{2}{12}=\frac{1}{6};\\\\3). \ \ \frac{1}{6}-1,3=\frac{1}{6}-\frac{13}{10}=\frac{5-39}{30}=-\frac{34}{30}=-1\frac{2}{15};$