The expanded form of 8.478 shows the value of each digit based on its place value. The digits after the decimal represent tenths, hundredths, and thousandths

8.478 = 8 + 0.4 + 0.07 + 0.008
or,
8.478 = 8 x 1 + 4 x 1/10 + 7 x 1/100 + 8 x 1/1000
Let’s break down the number 8.478 by place value.
| Digit | Place Value | Value |
| 8 | Ones | 8 x 1 = 8 |
| 4 | Tenths | 4 x 0.1 = 0.4 |
| 7 | Hundredths | 7 x 0.01 = 0.07 |
| 8 | Thousandths | 8 x 0.001 = 0.008 |
When we add these values together:
8 + 0.4 + 0.07 + 0.008 = 8.478
What is 35713 in expanded form?
What is 45678 in expanded form?