34.5 ×76.5-345

34.5乘76.5减345乘6.42减123乘10.45=34.5乘76.5减34.5乘64.2减123乘10.45=34.5×（76.5-64.2）-123×10.45=34.5×12.3-12.3

76.5（10+0.2）=765+76.5*0.2=765+15.3=780.3

这么简单的题,分母提出10（乘法分配率小学是学的）123+234+345+456+567+678+789/（12.3+23.4+34.5+45.6+56.7+67.8+78.9）＝10（12.3+23

123×345÷567÷123×567÷345=42435÷567÷123×567÷345=74.84127÷123×567÷345=0.608466×567÷345=345.000222÷345=1

34.5×76.5－345×6.42=34.5×76.5－34.5×64.2=34.5×12.334.5×12.3－123×1.45=34.5×12.3－12.3×14.5=12.3×20=246

566*345+567分之567*345+222=566*345+567分之566*345+345+222=566*345+567分之266*345+567=1

46×345+53×345+345＝（46＋53＋1）×345＝100×345＝34500

解题思路：根据化学反应进行分析解题过程：varSWOC={};SWOC.tip=false;try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/re

34.5*76.5-123*1.45-345*6.42=345*7.65-123*1.45-345*6.42=345*（7.65-6.42）-123*1.45=345*1.23-123*1.45=3.

34.5*76.5-345*6.42-123*1.45=2639.25-2214.9-178.35=246

34.5×76.5-345×6.42-123×1.45=34.5×(76.5-64.2)-123×1.45=34.5×12.3-123×1.45=12.3×(34.5-14.5)=12.3×20=24

34.5*8.23-34.5+27.7*3.45=34.5*8.23-34.5+2.77*34.5=34.5*（8.23-1+2.77）=34.5*10=345

34.5×9.23-34.5+1.77×34.5，=34.5×（9.23-1+1.77），=34.5×10，=345．

34.5*76.5-345*6.42-123*1.45=34.5*76.5-64.2*34.5-12.3*14.5=34.5*(76.5-64.2)-12.3*14.5=34.5*12.3-12.3*

应该是34.5*76.5-34.5*64.2-123*1.45吧?如果是的话,应该是：34.5*（76.5-64.2）-12.3*14.5=12.3*（34.5-14.5）=246

：567+345×566567×345+222，=567+345×566(566+1)×345+222，=567+345×566345×566+345+222，=567+345×566345×566+

567×345+222=567×345+(567-345)=345×(567-1)+567=345×566+567所以,(567+345*666)/(567*345+222)=1

34.5乘76.5-345乘6.42-123乘1.45=34.5×76.5-34.5×64.2-123×1.45=34.5×(76.5-64.2)-123×1.45=34.5×12.3-123×1.4

大水牛电源345EAA物美价廉你问的是个电源的型号