Question

(3 5/6-2/60)+4
2 1/7+(4/7+1 2/7)
6 2/5-(1 3/5-1/5)
(3 7/8+1/8)-2 5/8

7/9+(1 2/9-5/9)
(4 2/5+4/5)+1 4/5
6 1/4-(3 2/4+1 1/4)
(5-2 3/8)-7/8

Answer 1

1)
$(3 frac{5}{6} - frac{2}{60} )+4=(3 frac{50}{60} - frac{2}{60} )+4=3 frac{48}{60}+4=7 frac{4}{5}$
2)
$2 frac{1}{7} +( frac{4}{7} +1 frac{2}{7} )=2 frac{1}{7} +1 frac{6}{7} =3 frac{7}{7} =4$
3)
$6 frac{2}{5} -(1 frac{3}{5} - frac{1}{5} )=6 frac{2}{5} -1 frac{2}{5}=5$
4)
$(3 frac{7}{8} + frac{1}{8} )-2 frac{5}{8} =3 frac{8}{8} -2 frac{5}{8} =1 frac{3}{8}$
5) 
$frac{7}{9} +(1 frac{2}{9} - frac{5}{9} )= frac{7}{9} +( frac{11}{9} - frac{5}{9} )= frac{7}{9} +frac{6}{9}= frac{13}{9} =1 frac{4}{9}$
6)
$(4 frac{2}{5} + frac{4}{5} )+1 frac{4}{5} =4 frac{6}{5} +1 frac{4}{5}=5 frac{1}{5}+1 frac{4}{5} =6 frac{5}{5} =7$
7)
$6 frac{1}{4} -(3 frac{2}{4} +1 frac{1}{4} )=6 frac{1}{4} -4 frac{3}{4} =5 frac{5}{4} -4 frac{3}{4}=1 frac{2}{4} =1 frac{1}{2}$
8)
$(5-2 frac{3}{8} )- frac{7}{8}=(4 frac{8}{8} -2 frac{3}{8})- frac{7}{8} =2 frac{5}{8}- frac{7}{8}=1 frac{13}{8} - frac{7}{8}=1 frac{6}{8}=1 frac{3}{4}$