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[1019+(837:3+528:4)]x2=?

Răspuns :

[1019+(837:3+528:4)]x2=2860
=[1019+(279+132)]x2
=(1019+411)x2
=1430x2
=2860
837:3=279
528:4=132
279+132=411
1019+411=1430
1430×2=2860
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