72x26 36x52简便算帐试
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72x26+36x52
=36x2x26+36x52
=36x52+36x52
=36x52x2
=36x104
=36x(100+4)
=36x100+36x4
=3600+144
=3744
=36x2x26+36x52
=36x52+36x52
=36x52x2
=36x104
=36x(100+4)
=36x100+36x4
=3600+144
=3744
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