Bài 1:a)4(13-16)-(3-5)(-3)2 =4.(-3)-(-2)(-3)2 =(-3)4-(-2)(-3)=(-3)(4-6)=(-3)(-2)=6b)-25+711+-1110+7-11=-4-1110+7-711=-32c)12+-23+16+-25=3-4+16+-25=-25d)34.4-3635.5+10.34=34.4-3234.15+10=-525=-15
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