Ответы на вопрос:
((4,625-13/18•9/26): 2 1/4 + 2 1/2: 1,25: 6 3/4): 1 53/68=1 7/27
1) 13/18*9/26=1/4
2) 4,625-1/4=4,625-0,25=4,375
3) 4,375: 2 1/4=4375/1000: 9/4=4375/1000*4/9=35/18
4) 2 1/2: 1,25=5/2: 125/100=5/2*100/125=2
5)2: 6 3/4=2: 27/4=2*4/27=8/27
6)35/18+8/27=105/54+16/54=121/54
7)121/54: 1 53/68=121/54: 121/68=121/54*68/121=34/27=1 7/27
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