Question

$81 \frac{1}{2} (81 \frac{1}{2} + 1 )$
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Answer 1

Answer:

$\frac{26,895}{4} \\ \\ \\ 6723 \frac{3}{4}$

Step-by-step explanation:

$81 \frac{1}{2} (81 \frac{1}{2} + 1) \\ \\ = 81 \frac{1}{2}( \frac{163}{2} + \frac{1}{1} ) \\ \\ = \frac{163}{2} ( \frac{163 + 2}{2} ) \\ \\ = \frac{163}{2} \times \frac{165}{2} \\ \\ = \frac{26,895}{4} \\ \\ = 6723 \frac{3}{4}$

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