286.974 = 2 ∗ 100.000 + 8 ∗ 10.000 + 6 ∗ 1.000 + 9 ∗ 100 + 7 ∗ 10 + 4
The expanded form of 286.974 breaks down the number into the sum of each digit's value based on its position. It is written as 200 + 80 + 6 + 0.9 + 0.07 + 0.004. This method helps illustrate the contributions of each digit to the total value.
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