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¤ýReduction of fractions
(Reducing fractions by using the greatest common divisor)
¤ýAddition and subtraction of fractions
(Fractions with like denominators) |
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±âź ¼öÇÐ H´Ü°è 5Áý - ±âź±³À°¿¬±¸¼Ò ¿«À½ |
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