If + means -, - means x, x means ÷, ÷ means +, what will come in place of the question mark (?) in the given equation? 70 × 2 – 4 ÷ 60 + 150 = ?
Let's solve this question step-by-step by substituting the given meanings of the symbols:
- + means -
- - means ×
- × means ÷
- ÷ means +
The given equation is:
70 × 2 – 4 ÷ 60 + 150 = ?
Substituting the meanings, we get:
70 ÷ 2 × 4 + 60 - 150 = ?
Now, following the order of operations (division and multiplication from left to right, then addition and subtraction from left to right):
- \(70 ÷ 2 = 35\)
- \(35 × 4 = 140\)
- \(140 + 60 = 200\)
- \(200 - 150 = 50\)
Therefore, the solution to the equation is 50.
The correct answer is 50. The core concept here is to systematically replace each symbol with its new meaning as defined in the problem. Careful attention to the order of operations is crucial to obtain the correct result. Incorrect application of the order of operations can lead to wrong answers. Each operation should be performed sequentially after substituting the symbol. This problem tests the understanding of mathematical operations and the ability to follow instructions accurately. It underscores the importance of reading comprehension and meticulous calculation in problem-solving. Misinterpreting the symbol substitutions is a common pitfall in these types of questions, leading to calculation errors. Thus, a step-by-step approach ensures accuracy. The ability to translate symbols and systematically apply the rules of arithmetic is what leads to the correct answer.
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