Decimal notation is a special way to write a number; the fractional part is shown with digits to the right of a separator (in many countries a comma is used on paper).
A fraction whose denominator is 10, 100, 1000, and so on can be written without a fraction bar:
- 107=0.7 — “zero and seven tenths”;
- 10035=0.35 — “zero and thirty-five hundredths”;
- the mixed number 2103 is 2.3 — “two and three tenths”.
The number of digits after the separator matches the denominator: one digit — tenths, two — hundredths, three — thousandths.
Denominator 10, 100, 1000… → handy decimal form
Whole part left of the separator, fractional part right
Place value names the part: tenths, hundredths, thousandths…
A dot instead of a comma in the app
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