Question

Помогите пожалуйста решить дроби очень нужно

Answer 1

5.

$(5\frac{1}{2} +2\frac{3}{5}) *\frac{5}{9} \\1)5\frac{1}{2}+ 2\frac{3}{5} = \frac{11(5)}{2}+ \frac{13(2)}{5} =\frac{55+26}{10} =\frac{81}{10} \\2)\frac{-81-9}{-10-2}* \frac{-5-}{-9-} =\frac{9}{2} =\frac{45}{10} =4.5$

6.

$(7 -2\frac{5}{16}) *\frac{4}{25}\\1)7-2\frac{5}{16}=\frac{7(16)}{1} -\frac{37}{16}= \frac{112-37}{16} =\frac{75}{16\\}  \\2)\frac{-75-3}{-16-4}*\frac{-4-}{-25-} = \frac{3}{4} =0.75$

5.

$2\frac{2}{5}* \frac{5}{6}- \frac{3}{4}*1 \frac{2}{3}\\1)2\frac{2}{5} *\frac{5}{6} =\frac{-16-2}{-5-} *\frac{-5-}{-6-} =\frac{2}{1} =2\\2)\frac{3}{4} *1\frac{2}{3} =\frac{-3-}{4}* \frac{5}{-3-} =\frac{5}{4} =\frac{125}{100}=1.25\\3)2-1.25 = 0.75$

6.

а$1\frac{17}{28} *\frac{7}{9} +\frac{14}{25} *\frac{5}{7}\\1)1\frac{17}{28}* \frac{7}{9}= \frac{-45-5}{-28-4} *\frac{-7-}{-9-} =\frac{5}{4} = \frac{125}{100}=1.25 \\2)\frac{-14-2}{-25-5} *\frac{-5-}{-7-} =\frac{2}{5}=\frac{4}{10} =0.4\\3)1.25+0.4=1.65$