Tenths, hundredths, thousandths, ten-thousandths, etc...
2 is a number in decimal form. Litre is a unit of measurement and in terms of decimal, it is irrelevant.
Yes, a unit rate can be a decimal
A milligram (mg) is a measurement unit: it has no numerical value associated with it and so there is no decimal equivalent. If you want a milligram represented as a decimal equivalent of another unit: a pound or microgram, for example, you need to say so.
That is the decimal form.
120 is already in decimal form. You do not need to have a decimal point for a number to be in decimal form. All that is required is that the place values go down by a factor of one-tenth every time you move one digit to the right. Also the digit to the left of the decimal point (or where the decimal point would have been) has a unit place value.
That is decimal form.
That is the decimal form.
It is in decimal form.
That is the decimal form.
This is in decimal form.
That IS the decimal form.
0.29 IS in decimal form.