Răspuns:
Ex.1
a)844+(685+2150)=3679
16690-(1017+3999)=11674
10872-(15400-7858)=3330
b)8950-[8511-(11200-6503)=5136
13635+[6456+(18604-9735)=28960
127300-[130800-(90000+1840)=88340
Ex.2
a)25704+9182=34886
150000-34886=115114
b)34908+99001=136909
150000-136909=13091
c)45016+54015=99031
150000-99031=50969
Ex.3
a)13456+12458=25914
9000-2599=6401
25914-6401=19513
b)36177+7087=43264
10000-999=9001
43264+9001=52265
c)100000-(50001-28460)-(8500+3900)=
100000-9141=90859
Ex.4
10765-(2521+1890)+3008=9362
Vlad are dreptate
