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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).
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Why is the size of a decimal number not necessarily determined by the number of decimal places notated?
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.
When a number is divided by 100 the digits move?
The digits should stay where they are. The decimal point should move 2 places to the left.
N how many digits should be to the left of the decimal point?
There need not be any and there can be any number of them.
When writing a number in scientific notation how may digits should be to the left of the decimal point?
There should be exactly one digit.
When writing a number in scientific notation how many digits should be left on the decimal point?
Only on digit may be to the left of the decimal point. The mantissa must be a number in the interval [0, 10).
