Write 678 × 10-4 as an ordinary number.
A. 6780000 B. 0,0678 C. 0,678
The correct answer is C. 0,678
To write 678 × 10-4 as an ordinary number, we need to move the decimal point four places to the left because of the exponent of -4.
Starting with 678, move the decimal point four places to the left:
0.00678
So, the answer is C. 0.678