5375*712+(2559-837)*102-3075/15*42 = 3994034
1) 2559-837=1722
2) 5375*712=3827000
3) 1722*102=175644
4) 3075/15=205
5) 205*42=8610
6) 3827000+175644=4002644
7) 4002644-8610=3994034
7121350-(15125/25+302*804-986/17)*9=<span>4931155</span>
1) 15125/25=605
2) 302*804=242808
3) 986/17=58
4) 605+242808=243413
5) 243413-58=243355
6) 243355*9=
<span><span><span>
2190195
</span></span></span><span><span>
7) 7121350-</span></span>2190195=4931155
88*64+36*88=8800
48*97+48*3=4656+144=4800
<span>12*93+93*88=1116+8184=9300</span>
1) 8 : 2/9 = 8 * 9/2 = 36 лет отцу
2) 36 : 3/5 = 36 * 5/3 = 60 лет деду
Ответ:1454................