
用简便方法计算25乘46加75乘51?
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用简便方法计算25乘46加75乘51?
25x46+75x51
=25x46+25x3x51
=25x46+25x153
=25(46+154-1)
=25x200-25
=5000-25
=4975
25x46+75x51
=25x46+25x3x51
=25x46+25x153
=25(46+154-1)
=25x200-25
=5000-25
=4975
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