28x36+16x72简便计算

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28x69+72x369的简便方法

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28x65+28x35的简便运算

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287x36一87x36的简便计算

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280x36+360x72简便运算

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28x39+28的简便运算

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28x46+14x108的简便计算

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28x99-28x49简便计算

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268x98简便计算

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27x63+38x27-27简便运算

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28x36+16x72简便计算

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28x69+72x369的简便方法

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28x65+28x35的简便运算

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287x36一87x36的简便计算

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280x36+360x72简便运算

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28x39+28的简便运算

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28x46+14x108的简便计算

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28x99-28x49简便计算

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268x98简便计算

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27x63+38x27-27简便运算

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