Mathematics
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current location:Mathematical operation > History of fraction calculation
    19/90-1/90
    1/5+1/90
    1/4-1/20
    1/2-1/4
    3/4-1/4
    1/2+1/4
    1/4+1/2
    1/6+1/3
    1/15+1/10
    1/60+1/20
    17/300-1/25
    1/60+1/25
    1/60+1/25
    11/300-1/50
    1/60+1/50
    1/30-1/60
    1/3-3/10
    1/30+3/10
    1/100+1/1150
    11/1000+1/2750

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