79.4x16.7+79.4x27.6+34.3x20.6的简便方法？
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简便计算
79.4x16.7+79.4x27.6+34.3x20.6
=79.4x(16.7+27.6)+34.3x20.6
=79.4x44.3+44.3x20.6-10x20.6
=(79.4+20.6)x44.3-206
=100x44.3-206
=4430-206
=4224
79.4x16.7+79.4x27.6+34.3x20.6
=79.4x(16.7+27.6)+34.3x20.6
=79.4x44.3+44.3x20.6-10x20.6
=(79.4+20.6)x44.3-206
=100x44.3-206
=4430-206
=4224
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