`56.001 xx ? - 1000.999 = 231`

Options

A. 22
B. 45
C. 37
D. 32

Answer

To solve the equation \( 56.001 \times ? - 1000.999 = 231 \), we will follow these steps:

### Step 1: Simplify the equation
First, we can approximate the numbers involved. The number \( 1000.999 \) can be approximated to \( 1001 \). Thus, we rewrite the equation as:

\[ 56.001 \times ? - 1001 = 231 \]

### Step 2: Isolate the term with the question mark
Next, we will isolate the term with the question mark by adding \( 1001 \) to both sides of the equation:

\[ 56.001 \times ? = 231 + 1001 \]

### Step 3: Perform the addition
Now, we calculate the right side:

\[ 231 + 1001 = 1232 \]

So, we have:

\[ 56.001 \times ? = 1232 \]

### Step 4: Solve for the question mark
To find the value of \( ? \), we will divide both sides by \( 56.001 \):

\[ ? = \frac{1232}{56.001} \]

### Step 5: Approximate the division
Since \( 56.001 \) is very close to \( 56 \), we can approximate the division:

\[ ? \approx \frac{1232}{56} \]

Calculating this gives:

\[ ? \approx 22 \]

### Final Answer
Thus, the approximate value of \( ? \) is \( 22 \).