Вычислим:
a) $$\frac{1}{6}$$ от $$7004 – ((653 + 226) \cdot 2 + 44)$$.
- $$653 + 226 = 879$$
- $$879 \cdot 2 = 1758$$
- $$1758 + 44 = 1802$$
- $$7004 - 1802 = 5202$$
- $$\frac{1}{6} \cdot 5202 = \frac{5202}{6} = 867$$
б) $$\frac{1}{21}$$ от $$(1424:8 + 6878):16$$
- $$1424 : 8 = 178$$
- $$178 + 6878 = 7056$$
- $$7056 : 16 = 441$$
- $$\frac{1}{21} \cdot 441 = \frac{441}{21} = 21$$
в) $$\frac{3}{5}$$ от $$543600 : 90 – 18 \cdot (13 + 242)$$.
- $$13 + 242 = 255$$
- $$18 \cdot 255 = 4590$$
- $$543600 : 90 = 6040$$
- $$6040 - 4590 = 1450$$
- $$\frac{3}{5} \cdot 1450 = \frac{4350}{5} = 870$$
Ответ: а) 867, б) 21, в) 870