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把下列各分数化成最简分数.15/18=12/1621/63=20/45=21/49=28/36=
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把下列各分数化成最简分数.
15/18= 12/16 21/63= 20/45= 21/49= 28/36=
15/18= 12/16 21/63= 20/45= 21/49= 28/36=
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答案和解析
15/18= 5/6 12/16 =3/4 21/63= 1/3 20/45= 4/9 21/49= 3/7 28/36=7/9
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