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Calculeaza asociind termenii.
360+154+240; 515+105+98; 390+127+423.


Răspuns :

360+154+240=

600+154=754

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515+105+98=

620+98=718

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390+127+423=

390+550=940

Am asociat termenii ca in cerinta pentru a calcula mai usor

360+154+240=514+240=754

515+105+98=620+98=718

390+127+423=517+423=940