Use digits and a decimal point to write the number one trillion, six hundred twenty-five billion, two hundred fifty thousand, twenty-five and one hundred twenty-three thousandths.

To write the number one trillion, six hundred twenty-five billion, two hundred fifty thousand, twenty-five and one hundred twenty-three thousandths using digits and a decimal point, you would follow these steps: 1. Write the number of trillions (1 trillion = 1,000,000,000,000). 2. Write the number of billions (625 billion = 625,000,000,000). 3. Write the number of millions (250 thousand = 250,000). 4. Write the number of thousands (25 thousand = 25,000). 5. Write the number of hundreds (25 = 25). 6. Write the number of tenths (1 = 0.1). 7. Write the number of hundredths (2 = 0.02). 8. Write the number of thousandths (3 = 0.003). Combining all these parts, the number is: 1,000,000,000,000 + 625,000,000,000 + 250,000 + 25,000 + 25 + 0.1 + 0.02 + 0.003 This simplifies to: 1,625,250,025,025.123 So, the number one trillion, six hundred twenty-five billion, two hundred fifty thousand, twenty-five and one hundred twenty-three thousandths is written as 1,625,250,025,025.123.