Question

If $\begin{array}{cc}& {}^{\prime }{+}^{\prime }{\to }^{\prime }{÷}^{\prime }{}^{\prime }{x}^{\prime }\to {}^{\prime }{-}^{\prime }\\ & {}^{\prime }{-}^{\prime }\to {}^{\prime }{x}^{\prime \prime }÷{}^{\prime }\to {}^{\prime }{+}^{\prime }\end{array}$ Find the value of $18+3\times 2-6$ $÷2$

Answer 1

Given ${}^{\prime }{+}^{\prime }{\to }^{\prime }{÷}^{\prime }$ ${,}^{\prime }{\times }^{\prime }{\to }^{\prime }{-}^{\prime },$ ${}^{\prime }{-}^{\prime }{\to }^{\prime }{\times }^{\prime }$ ${,}^{\prime }{÷}^{\prime }{\to }^{\prime }{+}^{\prime }$

$18+3\times 2-6÷2=(18+3)\times (2-6)÷2=6\times 12÷2=-4$