作业帮简算:34.5×76.5-345×6.42-12.3×14.5
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/02 09:17:34
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简算:34.5×76.5-345×6.42-12.3×14.5
简算:34.5×76.5-345×6.42-12.3×14.5
简算:34.5×76.5-345×6.42-12.3×14.5
34.5×76.5-345×6.42-12.3×14.5
=34.5×76.5-34.5×64.2-12.3×14.5
=34.5×(76.5-64.2)-12.3×14.5
=34.5×12.3-12.3×14.5
=(34.5-14.5)×12.3
=20×12.3
=246
数学不及格，路过。。。
34.5x76.5-345x6.42-12.3x14.5
=34.5x76.5-34.5x64.2-12.3x14.5
=34.5x(76.5-64.2)-12.3x14.5
=34.5x12.3-12.3x14.5
=12.3x(34.5-14.5)
=12.3x20
=246
简算:34.5×76.5-345×6.42-12.3×14.5
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