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Apply BODMAS rule immediately after swapping symbols to ensure calculation priority (Division/Multiplication first, then Addition/Subtraction).
Apply BODMAS rule immediately after swapping symbols to ensure calculation priority (Division/Multiplication first, then Addition/Subtraction).
Symbol Substitution
Replace the original operators in 42 x 6 + 5 / 8 - 34 as follows: replace x with /, replace + with -, replace / with x, and replace - with +. The new expression becomes: 42 / 6 - 5 * 8 + 34.
BODMAS Calculation
Perform the operations in order: First Division (42 / 6 = 7), then Multiplication (5 * 8 = 40). The expression now reads 7 - 40 + 34.
Final Addition and Subtraction
Solve 7 - 40 + 34. Combine positive numbers first: 7 + 34 = 41. Finally, 41 - 40 = 1.
A: 4 is incorrect as the calculated result is 1, not 4. C: 5 is incorrect because it exceeds the calculated result of 1. D: 3 is incorrect because it does not match the final evaluation of 1.
B is correct because the expression 42 / 6 - 5 * 8 + 34 simplifies to 7 - 40 + 34, which equals 1.
Always write down the substituted equation clearly before starting the calculation to avoid mixing up operators during the sign conversion process.
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