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3.6×42.3×3.75-12.5×0.423×16 要简便运算!

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:2024/11/19 03:59:05
3.6×42.3×3.75-12.5×0.423×16 要简便运算!
3.6×42.3×3.75-12.5×0.423×16 要简便运算!
3.6x42.3x3.75-12.5x0.423x16=36x0.423x37.5-12.5x0.423x16=4x9x0.423x12.5x3-12.5x0.423x4x4=4x12.5x0.423x(3x9-4)=50x23x0.423=115x4.23=486.45