简便算法
第1个回答 2020-02-01
解:
3.12×1.6-48.6×1.6+1.74×1.6
=(3.12-48.6+1.74)×1.6
=-43.74×1.6
=-69.984
3.12×1.6-48.6×1.6+1.74×1.6
=(3.12-48.6+1.74)×1.6
=-43.74×1.6
=-69.984
第2个回答 2020-02-01
3.12×1.6-48.6×0.6+1.74×1.6
=(3.12×1.6+1.74×1.6)-48.6×0.6
=(3.12+1.74)×1.6-48.6×0.6
=4.86×1.6-48.6×0.6
=48.6×0.16-48.6×0.6
=48.6×(0.16-0.6)
=48.6×(-0.44)
=-21.384本回答被网友采纳
=(3.12×1.6+1.74×1.6)-48.6×0.6
=(3.12+1.74)×1.6-48.6×0.6
=4.86×1.6-48.6×0.6
=48.6×0.16-48.6×0.6
=48.6×(0.16-0.6)
=48.6×(-0.44)
=-21.384本回答被网友采纳