Question 48
If '$$+$$' means '$$-$$', '$$-$$' means '$$\times$$' and '$$\times$$' means '$$\div$$', then $$15 - 3 + 10 \times 5 + 5 = ?$$
Solution
'$$+$$' means '$$-$$',
$$-$$' means '$$\times$$'
and '$$\times$$' means '$$\div$$'
$$15 - 3 + 10 \times 5 + 5 = ?$$
$$15\times 3 - 10\div 5 - 5 = ?$$
Apply bodmass rule
$$15\times 3 - 2 - 5 = ?$$
$$45 - 2 - 5 = ?$$
$$45 - 2 - 5 = 38$$
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