If the mathematical operator `'+'` means `'div','-'` means `'+','div'` means `' xx' and 'xx'` means `'-'`, then the value of `17 - 7-27+3xx79` is

Options

A. -1
B. 0
C. 1
D. 2

Answer

To solve the expression \(17 - 7 - 27 + 3 \times 79\) using the given mathematical operator meanings, we need to replace each operator with its corresponding meaning:

1. **Identify the meanings of the operators:**
- \(+\) means \(\div\)
- \(-\) means \(+\)
- \(\div\) means \(\times\)
- \(\times\) means \(-\)

2. **Rewrite the expression using the new meanings:**
The original expression is:
\[ 17 - 7 - 27 + 3 \times 79 \]
Replacing the operators:
- \(17 - 7\) becomes \(17 + 7\)
- \(- 27\) becomes \(+ 27\)
- \(+ 3\) becomes \(- 3\)
- \(\times 79\) becomes \(- 79\)

So, the expression now looks like:
\[ 17 + 7 + 27 - 3 - 79 \]

3. **Calculate the expression step by step:**
- First, calculate \(17 + 7\):
\[ 17 + 7 = 24 \]
- Next, add \(27\):
\[ 24 + 27 = 51 \]
- Now, subtract \(3\):
\[ 51 - 3 = 48 \]
- Finally, subtract \(79\):
\[ 48 - 79 = -31 \]

4. **Final result:**
The value of the expression \(17 - 7 - 27 + 3 \times 79\) is \(-31\).