`19.003 xx 22.988-280.010`

Options

A. a. 220
B. b. 110
C. c. 160
D. d. 90

Answer

To solve the expression \( 19.003 \times 22.988 - 280.010 \) using approximation, we can follow these steps:

### Step 1: Approximate the numbers
- Round \( 19.003 \) to \( 19 \).
- Round \( 22.988 \) to \( 23 \).
- Keep \( 280.010 \) as \( 280 \).

### Step 2: Multiply the approximated numbers
Now, we calculate:
\[ 19 \times 23 \]

### Step 3: Perform the multiplication
Calculating \( 19 \times 23 \):
\[ 19 \times 23 = 437 \]

### Step 4: Subtract the approximated number
Now, we subtract \( 280 \) from \( 437 \):
\[ 437 - 280 \]

### Step 5: Perform the subtraction
Calculating \( 437 - 280 \):
\[ 437 - 280 = 157 \]

### Conclusion
The final approximate result is \( 157 \).