It depends on the numbers you're dealing with. If the number is less than 1, you should definitely put a leading 0 (ie; 1/4 = 0.25, not .25, generally not 00.25). If the number is greater than 1, any whole numbers (numbers you could count on your fingers, if you had enough time) should go to the left of the decimal point and the rest should go on the right (ie; 2500 & 3/8 = 2500.375, since you can count up to 2500 on your fingers with enough time, but most people don't have 3/8 of a finger).
Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude. Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude. Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude. Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude.
The digits should stay where they are. The decimal point should move 2 places to the left.
There need not be any and there can be any number of them.
There should be exactly one digit.
Only on digit may be to the left of the decimal point. The mantissa must be a number in the interval [0, 10).
Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude. Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude. Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude. Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude.
The digits should stay where they are. The decimal point should move 2 places to the left.
There need not be any and there can be any number of them.
There should be exactly one digit.
Only on digit may be to the left of the decimal point. The mantissa must be a number in the interval [0, 10).
You don't move the decimal point at all. You just multiply the numbers and the point should sort itself out or be put of how many digits it is to be.
There should be exactly one non-zero digit.
If you want to have it in standard format, only one.
One: no more and no fewer. And it cannot be a zero.
Just the one digit from 1 to 9
You move the decimal point two digits to the left. Note that an integer has an implied decimal point to its right. Examples: 33.412 / 100 = 0.33412 112.4 / 100 = 1.124 15 / 100 = 15.0 / 100 = 0.15
No. 0.0000123 has three significant digits.