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Efectuati: a) 28,4:10²+10[16,8–(400:100–4)] b) 124,5x(7,82:10–0,54)–2,4².

Răspuns :

28.4:100+10(16.8-0)=0.284+168=168.284

si
124,5x(0.782-0.54)-5.76 =30.129-5.76=24.369