3. 12368+86321=98689
1237+7321=8558
1234+4321=5555
23456+65432=88888
12478+87421=99999
4.a)5800 ; 5891
4800; 4831
6900; 7008
b) 39000; 40300
35000; 24921
310000; 286320
5. a-23164=12521
a= 12521+23164
a=35685
111231+b=999777
b=999777-111231
b=888546
78654-c=5322
c= 78654-5322
c= 73332
Nu sunt grele exercitiile : (
