(16 x 1/8 + 2 ) x 1 1/3 =
(16*\frac{1}{8}+2)*1\frac{1}{3}=(\frac{16}{8}+2)*1\frac{1}{3}=4*\frac{4}{3}=\frac{16}{3}=5\frac{1}{3}
(5 2/15 + 1/2 ) - 3/5 =
(5\frac{2}{15}+\frac{1}{2})-\frac{3}{5}=(5\frac{4}{30}+\frac{15}{30})-\frac{3}{5}=5\frac{19}{30}-\frac{18}{30}=5\frac{1}{30}
5 1/2 - 3/4 * 6 + 8 =
5\frac{1}{2}-\frac{3}{4}*6+8=\frac{11}{2}-\frac{9}{4}+8=\frac{2}{4}=8=8\frac{1}{2}
4 x 1/20 x 5 =
4*\frac{1}{20}* 5=\frac{1}{5}*5=1
( 5 x 1/10 + 1/2 ) x 2 =
(5+\frac{1}{10}+\frac{1}{2})*2=(5+\frac{1}{10}+\frac{5}{10})*2=5\frac{6}{10}*2=5\frac{3}{5}*2=\frac{28}{5}*2=\frac{56}{5}=11\frac{1}{5}
( 1/10 + 5/7 + 9/10 + 2/7 ) * 3 =
\frac{1}{10}+\frac{5}{7}+\frac{9}{10}+\frac{2}{7})*3=(\frac{7}{70}+\frac{50}{70}+\frac{63}{70}+\frac{20}{70})*3=\frac{140}{70}*3=2*3=6
1/4 * 5 + 1/4 * 5 2/4 * 5 =
\frac{1}{4}*5+\frac{1}{4}*5\frac{2}{4}*5=\frac{5}{4}+\frac{1}{4}*\frac{22}{4}=\frac{5}{4}+\frac{5}{4}*\frac{22}{4}=\frac{5}{4}+\frac{5}{4}*\frac{11}{2}=\frac{10}{8}+\frac{55}{8}=\frac{65}{8}=8\frac{1}{8}