1. Move the decimal point: Start with the number 251,963. Imagine the decimal point is at the end (251,963.). Move the decimal point to the left until there's only one non-zero digit to the left of the decimal. In this case, you'll move it five places to the left: 2.51963.
2. Count the moves: You moved the decimal point five places to the left.
3. Express as a power of 10: Since you moved the decimal point to the left, the power of 10 will be positive. The number of places you moved it becomes the exponent: 10⁵.
4. Combine: Now you have: 2.51963 x 10⁵
Therefore, 251,963 in scientific notation is 2.51963 x 10⁵