21x32+58x68+32x37的简便方法
21x32+58x68+32x37çç®ä¾¿æ¹æ³
21x32+58x68+32x37
=32*ï¼21+37ï¼+58*68
=32*58+58*68
=58*ï¼32+68ï¼
=58*100
=5800
21x32+58x68+32x37
=32*ï¼21+37ï¼+58*68
=32*58+58*68
=58*ï¼32+68ï¼
=58*100
=5800
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