There are essentially three forms:
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Write a decimal point, and then write three zeros after it.Now, anything you write after the three zeros, no matter how many digits andno matter how large or small they are, forms a number written as a decimal thatis less than one thousandth.There are an infinite number of them. Here are three:0.00010.00097625940.00000000000008
The number 170 as a decimal is simply 170.0. In decimal form, whole numbers are represented with a decimal point and a zero in the tenths place. This is to indicate that the number is a whole number and does not have any fractional parts.
4 is a whole number and can never be a decimal.
At least five. If you want to, you can write a decimal point at the end of the number, and then add as many zeroes as you want after the decimal point. They won't change the value of the number.
On digit (not didgit!).