Define scientific notation
In scientific notation a number is expressed as some power of ten multiplied by a number between 1 and 10.
What is significant figure?
A significant figure is one,which is known to be reasonable and reliable.
All the accurately known digits and first doubtful digit in an expression are called significant figures.
Significant figures rules
- Digits other than zero are always significant.
- Zeroes between significant digits are also significant.
- Zero on the left of the significant figures is not significant.
- Zero on the right of significant figure is not significant.
Zero on the right of a fractional number is significant