How do you write 3.141 in expanded notation?

1 Answer

3×1+1×110+4×1100+1×11000

Explanation:

In expanded notation each digit is written as a product of the digit and the place value that it occupies.

The 3 is in the 1's place a whole number.
The first 1 is in the tenth's place (0.1) or 1/10
the 4 is in the hundredth's place (0.01) or 1/100
The second 1 is in the thousandth's place (0.001) or 1/1000

so 3×1+1×110+4×1100+1×11000