B) -15-6. (7-2.5)+ (-20+ 24 : 8)= c) [ -9-(-2)] ÷ [(-6). (-6) - 10]=
e) - 2/3 + (3/4 + 1/2)=
f) -2/3 - (+1/6) =
e) - 2/3 + (3/4 + 1/2)=
f) -2/3 - (+1/6) =
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