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Question 47
If `+' means `multiplication', '— ' means `division', `$$\times$$' means `subtraction' and `$$\div$$' means 'addition', then 9 + 8 $$\div$$ 8 — 4 $$\times$$9 is
Solution
9 + 8 $$\div$$ 8 — 4 $$\times$$9
$$9\times 8 + 8\div 4 - 9$$
Apply bodmass rule
$$9\times 8 + 8\div 4 - 9$$
$$9\times 8 + 2 - 9$$
$$72 + 2 - 9$$
65
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