From BODMAS 30+ [ 10 910 9 3] × 5 =30+ [ 1 2] × 5 = 30+ ( 52) =60 52 =552 = 27 22 ⇒ 30+ [ 10 910 9 3] × 5 = 27 12 ...

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Order of Operations

30+[10-910-9-...

Question

$30 + [\frac{10 - 9}{10 - 9 - 3}] \times 5$ .

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Solution

From $B O D M A S$
$30 + [\frac{10 - 9}{10 - 9 - 3}] \times 5$
$= 30 + [\frac{1}{- 2}] \times 5$
$= 30 + (\frac{- 5}{2})$
$= \frac{60 - 5}{2}$
$= \frac{55}{2} = 27 \frac{2}{2}$
$\Rightarrow 30 + [\frac{10 - 9}{10 - 9 - 3}] \times 5 = 27 \frac{1}{2}$

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