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1. [(25+5)×10-170]+2800

Răspuns :

(30x10-170)+2800
(300-170)+2800
130+2800=2930
SPER CA TE-AM AJUTAT :) XD
1) 25+5=30
2) 30x10=300
3)300-170=130
4)130+2800=2930