What will come in place of the question mark (?) in the following questions ?
$$4\frac{1}{2}+(1 \div 2\frac{8}{9})-3\frac{1}{13}=?$$
Let the number be y
$$4\frac{1}{2}+(1\div 2 \frac{8}{9})-3\frac{1}{13}=?$$
$$\frac{9}{2}+(1\div \frac{26}{9})-\frac{40}{13}$$
$$\frac{9}{2}+\frac{9}{26}-\frac{40}{13}$$
$$\frac{117+9-80}{26}$$
$$\frac{46}{26}$$
$$\frac{23}{13}$$
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