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
5 10/15 - 12/15 = 4 25/15 - 12/15 = 4 13/15
(1,2+x)×(-5)=4
-6-5x=4
-5x=10(:(-5))
x=-2
Проверка:
(1,2+(-2))×(-5)=4
-2,4×(-5)=4
4=4
Ответ:-2
1)6 5/8-3 11/12=2 17/24
2)1 1/12:2 17/24=2/5
3)2/5*4 1/6=1 2/3
4)4 1/12+1 2/3=6 1/12