How to add fractions with different denominators
Build equivalent fractions over one common denominator, add the numerators, and reduce the exact result.
Read articleRules behind exact fractions
Understand denominators, decimal behavior, and equivalent forms
Three practical guides explain why unlike denominators need a common unit, how reduced denominators determine decimal behavior, and how mixed and improper forms preserve one exact value.
Why some fractions terminate and others repeat as decimals
Reduce the fraction and inspect the prime factors of its denominator to classify its base-ten decimal exactly.
Read articleMixed numbers and improper fractions name the same value
Convert between whole-plus-proper and improper forms exactly, including negative values, then verify the round trip.
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