1/3 * (2 2/15*6 1/4-5 1/3*1 1/8) + 4 5/9

1/3 * (2 2/15*6 1/4-5 1/3*1 1/8) + 4 5/9 =

= 1/3 * (32/15 * 25/4 - 16/3 * 9/8) + 4 5/9 (дроби с целыми числами перевели в неправильные) =

= 1/3 * (800/60 - 144/24) + 4 5/9 =

= 1/3 * (80/6 - 6) + 4 5/9 =

= 1/3*80/6 - 1/3*6 + 4 5/9 =

= 80/18 - 2 + 4 5/9 =

= 40/9 - 2 + 41/9 = 81/9 - 2 = 9 - 2 = 7.