1.5x105、2.33x0.5x4、1.2x2.5+0.8x2.5这三个用简便算法怎么算?

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/10 22:46:38

1.5x105
=1.5×(100+5)
=150+7.5
=157.5
2.33x0.5x4
=2.33×2
=4.66
1.2x2.5+0.8x2.5
=0.3×4×2.5+0.2×4×2.5
=0.3×10+0.2×10
=3+2
=5

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