What is the zero before a decimal called?

The zero before a decimal point, as in 0.5, is called a leading zero, and it acts as a placeholder, indicating the number is less than one and making the decimal point clear, though it's generally not considered a significant figure unless it's part of a specific formatting for accuracy.

Are 0.4 and 0.40 the same?

Yes, 0.4 and 0.40 are the same value because adding zeros at the end of a decimal doesn't change its numerical quantity, representing four-tenths (4/10 or 40/100). While numerically equal, 0.40 can imply a higher precision (measured to the hundredths place) than 0.4 (measured to the tenths place), but they are still the same number. 

What do you call a number before decimal?

the number before the decimal point is called the whole number while the number after the decimal point is called the part of a whole.

What is 0.01 called?

The number 0.01 is called "one hundredth," representing one part out of a whole divided into 100 equal parts, and can also be expressed as the fraction 11001 over 100 end-fraction1100 or 1×10-21 cross 10 to the negative 2 power1×10−2 in scientific notation, with "centi-" being the metric prefix for one-hundredth. 

What is .005 as a percent?

So, to find what is 0.005 as a percent, first, move the decimal point two places to the right. Then, add the percent sign. The percent form of 0.005 is written as 0.5%.

How to Read and Write a Decimal

How do you say .0015 in words?

It would be read as 15 thousandths. . 0015 would be 15 tenths (short for ten-thousandths).

How do you write 42.356 in words?

The word form of 42.356 can be written as "forty-two point three five six" (saying each digit) or, in a more formal way, "forty-two and three hundred fifty-six thousandths", treating the decimal part as a fraction. 

Are 0.2 and 0.20 the same?

Both 0.20 and 0.2 represent the same decimal value: two tenths.

Is 0.5 closer to 0 or 1?

It is exactly halfway between 0 and 1, so it is not closer to 1... nor is it closer to 0. It is exactly halfway between them. The same principle applies to other things like 11.5 or 23.5.

Does 0.1 exist?

In the IEEE 754 standard, which defines how floating-point numbers are represented, 0.1 cannot be represented exactly. Why? For the same reason you can't write 1/3 as a finite decimal: 0.3333… forever.

Is .02 or .04 bigger?

0.02 is smaller than 0.04.

Is .07 or .05 bigger?

0.07 is bigger than 0.05 because in decimal numbers, the digit further to the right in the tenths place (7) is larger than the digit in the tenths place for the other number (5), making 0.07 a larger value, similar to how 7 cents is more than 5 cents.
 

What is .0001 called?

The number .0001 is called one ten-thousandth, or in precision machining (using inches), it's often referred to as "one tenth", meaning one-tenth of a thousandth (0.001"). In scientific notation, it's written as 1×10-41 cross 10 to the negative 4 power1×10−4. 

How do machinists read decimals?

Machinist Talk

1. 0.1000. in math class = "one tenth" in a machine shop = "one hundred thousandths. ...
2. .0100. in math class = "one hundredths" in a machine shop = "Ten thousandths"
3. .0010. in math class = "one thousandths" ...
4. .0001. in math class = "one ten-thousandths" ...
5. .00001. in math class = "one hundred-thousandths"