=3/ 10+ 1 1/2 1

= 173/2 10

3/2-( 1/3- 1/6)

=3/2- 1/3+ 1/6

=9/6-2/6+ 1/6

=8/6

= 1 and 1/3

5/9-(2/9+ 1/6)

=5/9-2/9- 1/6

= 1/3- 1/6

= 1/6

5/7-(5/6-2/7)+5/6

=5/7+2/7-5/6+5/6

= 1