What approximate value should come in place of the question mark (?) in the following questions ? (You are not expected to calculate the exact value) ?
`98.998 xx 9.889 + 0.89 = ?`

Options

A. 960
B. 991
C. 980
D. 985

Answer

To find the approximate value of the expression \( 98.998 \times 9.889 + 0.89 \), we can simplify the numbers to make the calculation easier. Here’s a step-by-step breakdown:

### Step 1: Round the Numbers
First, we round the numbers to make them easier to work with:
- \( 98.998 \) can be rounded to \( 99 \).
- \( 9.889 \) can be rounded to \( 10 \).
- \( 0.89 \) can be rounded to \( 1 \).

### Step 2: Multiply the Rounded Values
Next, we multiply the rounded values:
\[ 99 \times 10 = 990 \]

### Step 3: Add the Rounded Value of 0.89
Now, we add the rounded value of \( 0.89 \):
\[ 990 + 1 = 991 \]

### Step 4: Conclusion
The approximate value of the expression \( 98.998 \times 9.889 + 0.89 \) is \( 991 \).

### Final Answer
Thus, the answer to the question is approximately \( 991 \).

---