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(1+2+......+10434):10434= ?

Răspuns :

10434×10435:2:10434=5217,5
(1+2+......+10434):10434=

= 10 434 × (10 434 +1) : 2 : 10 434 =

= 10 434 × 10435 : 2 : 10 434 =

= 10 435 : 2 =

= 5 217,5