=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