Question

помогите пожалуйста,буду благодарен

Answer 1

Ответ: 16

Пошаговое объяснение:

$1)\frac{1}{2} +\frac{5}{6} =\frac{3+5}{6} =\frac{8}{6} \\ \\ 2)\frac{8}{6} -\frac{7}{9}=\frac{24-14}{18} =\frac{10}{18} =\frac{5}{9} \\ \\ 3)\frac{5}{9}:1\frac{2}{3} =\frac{5}{9}:\frac{5}{3} =\frac{5}{9} *\frac{3}{5} =\frac{1}{3} \\ \\ 4)15:2,4= 6,25=6\frac{1}{4} \\ \\ 5)6\frac{1}{4} -6\frac{1}{36} =6\frac{9}{36} -6\frac{1}{36}=\frac{8}{36}=\frac{2}{9} \\ \\ 6)\frac{1}{3} :\frac{2}{9} =\frac{1}{3} *\frac{9}{2}=\frac{3}{2}$

$7)2,75-\frac{2}{3} =2\frac{3}{4} -\frac{2}{3} =2\frac{9}{12} -\frac{8}{12} =2\frac{1}{12} \\ \\ 8)2\frac{1}{12}*1,2=\frac{25}{12} *\frac{12}{10} =\frac{5}{2} \\ \\ 9) \frac{7}{30} +\frac{5}{12} =\frac{14+25}{60}=\frac{39}{60} =\frac{13}{20} \\ \\ 10) \frac{13}{20}:0,13=\frac{13}{20} :\frac{13}{100} =\frac{13}{20} *\frac{100}{13} =5 \\ \\ 11)\frac{5}{2} :5=\frac{5}{2} *\frac{1}{5} =\frac{1}{2} \\ \\ 12)\frac{3}{2} +\frac{1}{2} =\frac{4}{2} =2\\ \\ 13)2:0,125=16$