1) $4/9$ $5/8$ 7.2
= $20/72$ 7.2
= 0.2777777777777778 7.2
= 1.9999999999999998

2) $11/2$ $22/11$ + 2 3/4 $22/11$ - 2 2/11 $35/6$ = $3/2$ $24/11$ + $11/4$ $24/11$ - $24/11$ $23/6$ = $72/22$ + $264/44$ - $552/66$ = 3.2727272727272725 + 6 - 8.363636363636363
= 1.9090909090909092

Therefore, the answers to the given expressions are:
1) 1.9999999999999998
2) 1.9090909090909092