必须简便！！！！！！很急的！！！！！！！
第1个回答 2011-03-25
38x29x38=30x38x38-38x38
38x38=40x38-2x38
40x38=40x40-2x40
综上，38x29x38=30x40x40-2x40-2x38-40x40-2x40-2x38
或者
38x29x38=38x38x29=（30x30+2x30x8+8x8）x（30-1）本回答被提问者采纳
38x38=40x38-2x38
40x38=40x40-2x40
综上，38x29x38=30x40x40-2x40-2x38-40x40-2x40-2x38
或者
38x29x38=38x38x29=（30x30+2x30x8+8x8）x（30-1）本回答被提问者采纳
第2个回答 2022-12-24
那就应该是
38×30×38-38×1×38.
=1,444×30-1,444
=43,320-1444
=41,876
38×30×38-38×1×38.
=1,444×30-1,444
=43,320-1444
=41,876
第3个回答 2011-03-23
38×29×38
=(40-2)*(40-2)*29
=(1600-160+4)*(30-1)
=1444*30-1444
=43320-1444
=41876
=(40-2)*(40-2)*29
=(1600-160+4)*(30-1)
=1444*30-1444
=43320-1444
=41876
第4个回答 2011-03-28
38×29×38
=(40-2)*(40-2)*29
=(1600-160+4)*(30-1)
=1444*30-1444
=43320-1444
=41876
=(40-2)*(40-2)*29
=(1600-160+4)*(30-1)
=1444*30-1444
=43320-1444
=41876
