1) и 3)
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1)1/1000
2)327/1000
3)58/1000=29/500
4)100/1000=1/10
5)300/1000=3/10
(387 + 543) - 456 • 23 = 930 - 10488 = - 9558
77 : 11 + 678 : 2 = 7/11 + 339 = 3736/11 = 339,636
381 - 210 + 540 : 5 = 381 - 210 + 108 = 279
4200*55=231000
79940:70=1142
1142*603=688626
231000+688626=919626
(2ф-3ф²)/5ф=2/5-(3/5)ф
$ [(2/5)-(3/5)ф]dф=(2/5)ф-ф³/3+С