All of the digits are significant:
In 1000000 there is one significant figure.
1000000
1000000
3 in A+
7
In 1000000 there is one significant figure.
One significant figure.
1000000) has 1 significant figure and a least significant decimal of 6.
All digits are significant in this case. Any digit after a decimal point is a significant digit.
4 significant digits.
Three of them
There are four of them
1000000
1000000
Four
3 in A+
7