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
