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Da coroana si 20 puncte!!!E urgent !!!!Ex 10!!

Da Coroana Si 20 PuncteE Urgent Ex 10 class=

Răspuns :

b si c ultimele doua numere
b=253486+256145=509631
b=c+405644 => c=b-405644 => c=103987
suma: 253486+103987+509631=867104
a+b+c=?
a=253486
b=253486+256145
c=b+405644
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b=509631
c=509631-405644
c=103987

a+b+c
253486+509631+103987=867104