Question

$7\frac{1}{5}:2\frac{4}{7} -8\frac{3}{4} :[10-(5\frac{1}{2})^{2} :4\frac{2}{5} ]+(3\frac{1}{8}*2):(8\frac{1}{12} -1\frac{5}{6} )$

Answer 1

$1) 5\frac{1}{2} *5\frac{1}{2} = \frac{11}{2} *\frac{11}{2} = \frac{121}{4} =30,25\\\\2)30,25:4\frac{2}{5} =30,25:4,4=6,875\\\\  3)10-6,875=3,125 \\ \\ 4)8\frac{3}{4} :3,125=8,75:3,125=2,8\\\\  5)7\frac{1}{5} :2\frac{4}{7} =\frac{36}{5} *\frac{7}{18} =\frac{14}{5} = 2,8\\\\  6)2,8 - 2,8 = 0\\\\  7)3\frac{1}{8} *2=6\frac{1}{4} \\\\  8)8\frac{1}{12} -1\frac{5}{6} =8\frac{1}{12} -1\frac{10}{12} = 6\frac{3}{12} =6\frac{1}{4} \\\\  9)6\frac{1}{4} :6\frac{1}{4} =1$