It is the leading digit.
Oh, dude, the leftmost nonzero digit is basically the first digit in a number that isn't zero. Like, it's the number that kicks off the party and gets things going. So, if you see a number like 503, the leftmost nonzero digit would be 5. Hope that clears things up for ya!
0.2.
It is 5000000.
What this means is to round to the biggest digit that is not zero (the one furthest to the left that is not zero). So: 2.814 would round up to 3 because the greatest nonzero digit is the two and the digit to the right of that (the 8) is between 5 & 9. Some more examples of rounding to the greatest nonzero place: 0.00080472 ≈ 0.0008 0.330921 ≈ 0.3 (It rounds down as the number to the right of the 3 is between 0 & 4) 9.1 ≈ 9 5.942 ≈ 6
It is the leading digit.
It is front-end estimation.
0.2.
It is 300000.
It is 6000000.
It is 300.
It is 500.
It is 90000.
500500
It is 5000000.
It is 3000000000.
The leading nonzero digit of the value determines the power of ten. For instance, 1234.0.The leading nonzero digit of the value is 1. Move 3 decimal places to the left from the starting point to get 1.234 * 10³.