By applying which of the following meanings of arithmetical signs, will the value of the expression $[800-10\div\frac{1}{2}\times35+75]$ be zero?
Solution
✅ Correct Option: 3
Under option 3: - original $-$ becomes $\div$ - original $\div$ becomes $\times$ - original $\times$ becomes $+$ - original $+$ becomes $-$ So the expression becomes $800\div10\times\frac12+35-75$. Using normal precedence: $80\times\frac12+35-75=40+35-75=0$.
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