Mathematics
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current location:Mathematical operation > History of fraction calculation
    3/4-3/7
    2/3-1/3
    3/1+5/4
    7/9-1/6
    1/5+3/10
    1/10+1/30
    3/7一4/7
    7/10-19/30
    7/15+1/6
    1/4-1/9
    2/5+1/2
    3/7+3/14
    7/9-5/9
    7/8+3/8
    3/5-1/2
    5/6-1/6
    4/7+1/7
    3/10+4/10
    4/5÷2/3
    1/7+1/5

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