Leading zeroes are usually written when there is a list of mixed words and numbers, and the list must be later sorted alphabetically by a cumputer, eg:
00
02
11
Nick
Peter
In this example, if 02 didn't have the leading zero, it would have been put after the 11.
On the other hand, zeroes written on the right express the precision of the measurement.
So if you inform that you weighted 2.56 grams of sugar, it implies that it has an error of 0.01 grams. And informing that you weighted exactly 2.5600 grams implies the error is 0.0001 grams.
the number is 4
A negative number is a number less than zero (to the left of the number zero, on a standard number-line). It is written with a minus sign. For example, -5 is 5 less than zero.
Only if the other number is not a whole number but has a decimal.
The number 43.0018 can be written as "forty-three point zero zero one eight."
1.56611 X 106 Zero superfluous, but will reappear when number is written out.
the number is 4
A negative number is a number less than zero (to the left of the number zero, on a standard number-line). It is written with a minus sign. For example, -5 is 5 less than zero.
Only if the other number is not a whole number but has a decimal.
A rational number
No. Quite simply an irrational number cannot be written as a fraction and you could write zero as a fraction ex. 0/1
It is zero because it's not needed in the Roman numeral system.
rational number
The number 43.0018 can be written as "forty-three point zero zero one eight."
1.56611 X 106 Zero superfluous, but will reappear when number is written out.
It is a rational fraction.
Seventy one point zero three two
one point zero