Solve: 1×100,000 + 2×10,000 + 4×1,000 + 9×1 in Standard Form

To solve this problem, we'll follow these steps:

• Step 1: Multiply each digit by the appropriate power of ten.
• Step 2: Sum the resulting values to find the final result.

Let's proceed with the calculations:
Step 1: Calculate each component of the expression:

• $1 \times 100,000 = 100,000$
• $2 \times 10,000 = 20,000$
• $4 \times 1,000 = 4,000$
• $9 \times 1 = 9$

Step 2: Add all the computed values together: $100,000 + 20,000 + 4,000 + 9 = 124,009$

Therefore, the solution to the problem is $124,009$.