1)4\5*1\6=4\30=2\15(cократила на 2)
2)23 2\3 - 15 5\9 = 71\3 +140\9= 213\9 - 140\9= 73\9
3)2\15*73\9=146\135
4)145\135*45\8 = 146\24=73\12
5)73\12-1\2=73\12-6\12=67\12
( 4/5 х 1/6) х (23 2/3 - 15 5/9) х 45/8 - 1/2 =
= (4/30)*(23 6/9 - 15 5/9) * 45/8 - 1/2 =
= (2/15)*(8 1/9) * 45/8 - 1/2 =
= 2/15 * 73/9 * 45/8 - 1/2 =
= 90/120 * 73/9 - 1/2 = 3/4 * 73/9 - 1/2 = 3*73/36 -1/2 = 73/12 - 1/2 =
= 67/12 = 5 7/12 ~ 5.58
