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unde se pune paranteza in exercitiile urmatoare:20+5×10-2=68;20+5×10-2=248;20+5×10-2=60

Răspuns :

20+(5×10)-2=68;20+(5×10)-2=248;20+(5×10)-2=60
20+(5×10)-2=68
(20+5)×10-2=248
20+5×(10-2)=60