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三位数三位数的计算题X试卷满分分100考试时间［自行设定时间］
一、计算题（每题分，共分）
51001.123X
4562.234X
5673.345X
6784.456X
7895.567X
8916.678X
9127.789X
1238.891X
2349.912X
34510.135X
79211.246X
81312.357X
92413.468X13514,579X
24615.681X
35716.792X
46817.813X
57918.924X
68119.147X
74120.258X852答案及解析
1.123X456=56088解析先将拆分为然后分别与相乘456400+50+6,123123X400最后将结果相加,=49200,123X50=6150,123X6=73849200+6150+738=
560882.234X567=132678解析把分成567500+60+7,234X500=117000,234X60=14040,二234X7=1638,117000+14040+1638132678o
3.345X678=233910解析拆成678600+70+8,345X600=207000,345X70=24150,345X8=2760,207000+24150+2760=
2339104.456X789=360784解析写成789700+80+9,456X700=319200,456X80=36480,456X9=4104,319200+36480+4104=
3607845.567X891=505197解析拆分为891800+90+1,567X800=453600,567X90=51030,567X1=567,453600+51030+567=505197c
6.678X912=618336解析分成912900+10+2,678X900=610200,678X10=6780,678X2=1356,610200+6780+1356=
6183367.789X123=96047解析拆成123100+20+3,789X100=78900,789X20=15780,789X3=2367,78900+15780+2367=
960478.891X234=208494解析写成234200+30+4,891X200=178200,891X30=26730,891X4=3564,178200+26730+3564=
2084949.912X345=314640解析拆分为345300+40+5,912X300=273600,912X40=36480,二912X5=4560,273600+36480+4560314640c
10.135X792=106920解析分成二792700+90+2,135X700=94500,135X9012150,135X2=270,94500+12150+270=
10692011.246X813=200098解析拆成813800+10+3,246X800=196800,246X10=2460,246X3=738,196800+2460+738=200098o
12.357X924=329868解析写成二924900+20+4,357X900=321300,357X207140,357X4=1428,321300+7140+1428=329868o
13.468X135=63180解析拆分为135100+30+5,468X100=46800,468X30=14040,二468X5=2340,46800+14040+234063180o
14.579X246=142434解析分成二246200+40+6,579X200=115800,579X4023160,579X6=3474,115800+23160+3474=
14243415.681X357=243117解析拆成357300+50+7,681X300=204300,681X50=34050,681X7=4767,204300+34050+4767=
24311716.792X468=369696解析写成468400+60+8,792X400=316800,792X60=47520,792X8=6336,316800+47520+6336=
369696017.813X579=470727解析拆分为579500+70+9,813X500=406500,813X70=56910,二813X9=7317,406500+56910+7317470727o
18.924X681=639244解析分成681600+80+1,924X600=554400,924X80=73920,924X1=924,554400+73920+924=
63924419.147X741=108927解析拆成741700+40+1,147X700=102900,147X40=5880,147X1=147,102900+5880+147=
10892720.258X852=219816解析写成二852800+50+2,258X800=206400,258X5012900,258X2=516,206400+12900+516=219816。
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