Insert mathematical symbols in the place of ? to get the result.
(10?10)?25)?10 =10

Options

A. `-, xx ,+`
B. `xx,xx,+`
C. `+,×:,-:`
D. `-,+,+`

Answer

To solve the equation \( (10 ? 10) ? 25 ? 10 = 10 \), we need to insert mathematical symbols in place of the question marks. Let's analyze the expression step by step.

### Step 1: Choose the first operation
We start with the first part of the expression: \( 10 ? 10 \). A good operation to consider is subtraction, as it can lead to zero, which is a useful number in further calculations.

**Operation:** \( 10 - 10 \)

### Step 2: Evaluate the first operation
Now, we calculate \( 10 - 10 \):
\[ 10 - 10 = 0 \]

### Step 3: Insert the next operation
Next, we need to evaluate \( 0 ? 25 \). A multiplication operation will keep the result manageable, especially since we already have zero from the previous step.

**Operation:** \( 0 \times 25 \)

### Step 4: Evaluate the second operation
Now, we calculate \( 0 \times 25 \):
\[ 0 \times 25 = 0 \]

### Step 5: Insert the final operation
Finally, we need to evaluate \( 0 ? 10 \). Here, we can use addition to reach our target result of 10.

**Operation:** \( 0 + 10 \)

### Step 6: Evaluate the final operation
Now, we calculate \( 0 + 10 \):
\[ 0 + 10 = 10 \]

### Conclusion
Putting it all together, we have:
\[ (10 - 10) \times 25 + 10 = 10 \]
Thus, the symbols we inserted are:
- First symbol: \( - \)
- Second symbol: \( \times \)
- Third symbol: \( + \)

### Final Answer
The complete expression is:
\[ (10 - 10) \times 25 + 10 = 10 \]