Numerophobia or Arithmophobia is the exaggerated, constant and often irrational fear of numbers.
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They are called terminating decimals.
Irrational number or repeating decimal
All repeating decimals are rational numbers. Not all rational numbers are repeating decimals.
Yes it is. Repeating decimals are all repeating rationals.
Sometimes. Ellipses are used in repeating decimals like 7.4444... or 8.121212... to show that the pattern repeats forever. Repeating decimals are rational. Ellipses are also used in non-repeating, non-terminating decimals like pi = 3.14159... . Non-repeating, non-terminating decimals are irrational.