а) $$(30 803 – 342 \cdot 102 : 851) : 301 – (543 – 834 : 217) : 54$$
1) $$342 \cdot 102 = 34884$$
2) $$34884 : 851 = 41$$
41
--------------
851 | 34884
3404
------
844
851
-----
7
3) $$30803 - 41 = 30762$$
4) $$30762 : 301 = 102$$
102
----------------
301 | 30762
301
------
662
0
------
662
602
------
0
5) $$834 : 217 = 4$$
6) $$543 - 4 = 539$$
7) $$539 : 54 = 9.98148148...$$
9.981
----------------
54 | 539
486
------
530
486
-----
440
432
------
80
54
------
260
8) $$102 - 9.98148148 = 92.0185185185...$$
Ответ: 92.0185185185...