40.5*0.81-0.85 36用简便方法计算
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7.209
0.56×40.5+0.44×59.5=0.56*40.5+0.44*(40*5+19)=0.56*40.5+0.44*40.5+0.44*19=40.5*(0.56+0.44)+8.36=40.5+
40.5-0.36*2-0.28=40.5-0.72-0.28=40.5-(0.72+0.28)=40.5-1=39.5
40.5/0.81-4.8*0.5=45×0.9/(9×0.9)-4.8×1/2=5-2.4=2.6
再问:不是再问:但谢谢你再问:可以再次帮忙吗?再问:你对了再问:是除再问:
解题思路:等差数列解题过程:varSWOC={};SWOC.tip=false;try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.ph
fortypointfive
=(10-0.1)x0.81=10x0.81-0.1x0,81=8.1-0.081=8.019
0.81等于cos35.9°
第一个式子就是直接的计算了,40.5除以0.81直接等于50,然后50乘以1.2为60.用80.3直接减60就是22.3了.至于第二个式子:也是如此:1.2乘以4为4.8,然后是26.8-4.8为22
40.5/0.81*0.18=40.5/(0.405*2)*0.18=40.5/(40.5*0.02)*0.18=0.18/0.02=9
0.81×99+0.81=0.81×(99+1)=81
再答:过程有些简便了再答:我错了再答:
2.7
40.5/0.81-19.5=8010/81/2-19.5=100/2-19.5=50-19.5=30.5
0.81乘0.81乘99=0.81X0.81X99=0.81X0.81X(100-1)=0.81X0.81X100-0.81X0.81=0.81X81-0.81X0.81=0.81X(81.0.81)
40.5×0.56=0.405×56故此题应选:C.
根号(0.81)=根号(0.9×0.9)=+-0.9
没有简算40.5÷0.81--16x0.24=50-3.84=46.16