1. |________|_|_|
⬆39 ⬆⬆2 ani pt. fiecare
39+2+2=43
|________|__|__|
⬆ 39 ⬆⬆5 ani pt.fiecare
39+5+5=49
2. 213+459-370=
672-370=302
858-576+309=
282+309= 601
1085-(723+95)=
1085-818=267
3406+5275-2903=
8681-2903= 5778
(3509-1879)+(875-298)=
1630+577=2207
(7306+1398)-(2099+1005)=
8904-3104=5800
3.( 496+3829)-( 9737- 5809)
4325-3928=397