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简算:34.5×76.5-345×6.42-12.3×14.5

来源：学生作业帮 编辑：大师作文网作业帮 分类：数学作业 时间：2024/11/10 14:26:35
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
34.5*76.5-345*6.42-123*1.45 34.5×76.5×－345×6.42－123×1.45 要简算 34.5*76.5-123*1.45-345*6.42如何简算? 34.5×76.5-345×6.42-123×1.45（简便算法） 34.5乘76.5-345乘6.42-123乘1.45 34.5乘76.5减345乘6.42减123乘1045简便方法 34.5*76.5-345*6.42-123*1.45用简便方法怎算 请问“34.5乘76.5--34.5乘6.42-123乘1.45”怎样才能简便计算 计算123+234+345+456+567+678+789/12.3+23.4+34.5+45.6+56.7+67.8+ 巧算：（100+12.3+23.4）×（12.3+23.4+34.5）-（100+12.3+23.4+34.5）×（12 0.7*24.5+0.7*76.5-0.7简算 1.7*24.5+0.7*76.5-0.7简算