Any zeros between two significant digits are significant.
Explanation:
In scientific experiments, all numbers are obtained from measurements.Not all measurements are certain, so we have to use only the numbers that are significant.
So, we need significant numbers to help us decide how many digits should be included in a number so that it is significant.
These three rules help us decide the significant digits in a number:
The non zero digits will always be significant
The zeroes in midst of two non zero digits is significant
