<span>3 1/8-(2 2/3+1/3)=3 1\8-3=1\8
5 1/8-(2 2/3+3/4)+1/4=1 23\24
1)2 2\3+3\4=2 8\12+9\12=2 17\12=3 5\12
2)5 1\8-3 5\12=5 3\24-3 10\24=4 27\24-3 10\24=1 17\24
3)1 17\24+1\4=1 17\24+6\24=1 23\24</span>
(1 4/9 + 2 5/6 - 2 3/4) : (2 1/2 - 1/4) = 55/81
1) 1 4/9 + 2 5/6 = 1 8/18 + 2 15/18 = 3 23/18 = 4 5/18
2) 4 5/18 - 2 3/4 = 4 10/36 - 2 27/36 = 3 46/36 - 2 27/36 = 1 19/36
3) 2 1/2 - 1/4 = 2 2/4 - 1/4 = 2 1/4
4) 1 19/36 : 2 1/4 = 55/36 : 9/4 = 55/36 · 4/9 = (55·1)/(9·9) = 55/81
Четыреста пятьдесят вроде так