1). -6,5+3 1/2= -6,5+3.5= -3; 2). -9,75+2 3/4= -9,75+2,75= -7.
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1). -6,5+3 1/2= -6,5+3.5= -3; 2). -9,75+2 3/4= -9,75+2,75= -7.