Răspuns:
1.
a) 4002; 4001; 4000; 3999
b) 3488; 3490; 3492; 3494
c) 2454; 2457; 2500; 2503
2.
a)8*9=72
45:5=9
b)23*75=1775
84:2=42
725*3= 2175
74:4=19
3.
a)2 334 + 4 217=6605
5 234 -4 148=2149
b) 4039 + 3 468=7507
5 234 -4 148 =1086
c)5478 +3879 =9357
4000 - 345=3655