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10 cards from this deck
A decimal with a pattern of digits that repeats endlessly
A decimal that comes to an end
When the denominator (in simplest form) has only prime factors 2 and 5
0.3‾0.\overline{3}0.3 (recurring)
0.250.250.25 (terminating)
Let r=r =r= decimal, multiply by 10n10^n10n, subtract, solve for rrr
Multiply twice: once for non-repeating, once for recurring part
Make denominator all 9s; numerator shows recurring digits
Rule only works on fraction in simplest form
Use dot above repeating digit(s), e.g., 0.3‾0.\overline{3}0.3
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