23*45+(25*12)=1 335

Let's verify the calculation:

First, calculate \(23 \times 45\): 23 × 45 = (20 + 3) × 45 = (20 × 45) + (3 × 45) = 900 + 135 = 1035

Next, calculate \(25 \times 12\): 25 × 12 = (20 + 5) × 12 = (20 × 12) + (5 × 12) = 240 + 60 = 300

Now, sum both results: 1035 + 300 = 1335

The total is 1335, which matches your result. The calculation is correct.