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Coroana.
Calculati:

a) [2 la 2 x 5 la 2 x 5 + ( 2 la 9 x 75 9 la 2) : ( 8 x 5 la 2 x 3 la 5)] : 4


Răspuns :

[4×25×5+(81×75×81):(8×25×243)]:4=
(4×25×5+492075:48600)÷4=
(500+10,125)÷4=
510125÷127,53125