5/24+3/8+7/12``0.45=9/()=()/40=()除60·····通分计算5/12和13/18·····13/20和5/8
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![5/24+3/8+7/12``0.45=9/()=()/40=()除60·····通分计算5/12和13/18·····13/20和5/8](/uploads/image/z/382941-45-1.jpg?t=5%2F24%2B3%2F8%2B7%2F12%60%600.45%3D9%2F%28%29%3D%28%29%2F40%3D%28%29%E9%99%A460%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7%E9%80%9A%E5%88%86%E8%AE%A1%E7%AE%975%2F12%E5%92%8C13%2F18%C2%B7%C2%B7%C2%B7%C2%B7%C2%B713%2F20%E5%92%8C5%2F8)
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5/24+3/8+7/12``0.45=9/()=()/40=()除60·····通分计算5/12和13/18·····13/20和5/8
5/24+3/8+7/12``0.45=9/()=()/40=()除60·····通分计算5/12和13/18·····13/20和5/8
5/24+3/8+7/12``0.45=9/()=()/40=()除60·····通分计算5/12和13/18·····13/20和5/8
5/24+3/8+7/12=﹙5+9+14﹚/24=28/24=7/6
0.45=9/(20)=(18)/40=(27)除60
通分计算5/12+13/18=15/36+26/36=41/36
13/20+5/8=26/40+25/40=51/40