谁知道的,请告诉我?
第1个回答 2022-04-13
根据题意,原式=51×(39-9)-51=51×30-51=1530-51=1479,解题完毕,谢谢!
第2个回答 2022-04-05
39×51-51-51×9
=39×51-51×1-51×9
=51×(39-1-9)
=51×29
=1479
=39×51-51×1-51×9
=51×(39-1-9)
=51×29
=1479
第3个回答 2022-04-08
39x51-51-51×9
=51x【39-(1+9)】
=51x【39-10】
=51x29
=1479
=51x【39-(1+9)】
=51x【39-10】
=51x29
=1479
第4个回答 2022-04-05
39x51-51-51x9=(39-9)x51-51=30x51-51=1530-51=1479
第5个回答 2022-04-17
原式=39*51-9*51-51
=51*(39-9)-51
=51*30-51
=1530-51
=1479
=51*(39-9)-51
=51*30-51
=1530-51
=1479