Discussion
If P denotes ‘multiplied’ by’, T denotes ‘subtracted’ from’, M denotes ‘add to’ and B denotes ‘divided by’, then 28 B 7 P 8 T 6 M 4 =?
Answer: B
Correct answer: 30
Substituting gives \[ 28 \div 7 \times 8 - 6 + 4. \] Division and multiplication first, left to right: \( 28\div7 = 4 \), \( 4\times8 = 32 \). Then \( 32 - 6 + 4 = 30 \).
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