October 2018 2 23 Report
Realiza las siguientes operaciones: A) 7-(32-45)-6+(12-45); B) -(-5+7)-(4-(-6))+12; C) (9-4)-(6-2)+(12-4)-(7-9) ; D) (3-6)+(4-3)-(8-5)-3 ; E) 20-(30-37)+(18-25)-(-7)-(+20)
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