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If $$\left(8\ast4\right)+6-\left(10\div5\right)=8$$, then $$\ast$$ stands for the operation
We need $$8\ast4+6-10\div5=8$$. The multiplication and division choices give $$36$$ and $$6$$ respectively, while addition gives $$20$$. With subtraction, $$8-4+6-2=8$$, so $$\ast$$ represents subtraction.
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