五年级小数的乘除法练习题及答案

PAGE\*MERGEFORMAT#/12PAGE\*MERGEFORMAT#/12精品文档五年级小数的乘除法练习题及 答案 八年级地理上册填图题岩土工程勘察试题省略号的作用及举例应急救援安全知识车间5s试题及答案 一、直接写出得数：0.27X=.2=0.二1.25X=0.83+0.2=0.09X0.=10=0.1=.5=1.=.8-1.0=2.5X4.=.8X101=二、填空：1、已知两个因数的积是1.44，其中一个因数是1.2，另一个因数是。2、在计算除法3.96=0.12时，需要把除数的小数点向右移动两位变为整数，则被除数应扩大。4、根据算式45.5X3.6=163.8写出两个积为16.38的乘法算式①，②。5、4.90保留两位小数得，精确到十分位得。6、比较大小：.68X0.9909.6.82=0.9904.827、1.25时=分0.5天=时8、在4.2.234.23.32中最大的数是，最小的数是。三、判断：1、在除法运算中，商一定比被除数小。2、两个因数的小数位数的和是3，积的小数位数也一定是3。3、小数除法的意义与整数除法的意义完全相同。4、一个小数是循环小数，那它一定是无限小数。精品文档精品文档PAGE\*MERGEFORMAT#/12PAGE\*MERGEFORMAT#/125、求商的近似值与求积的近似值一样，先要算出商，再按要求取近似值。四、选择：1、在1.25X12X8=12X中，用到的乘法的①乘法交换律乘法结合律③乘法分配律④乘法交换律和结合律2、在计算除法时，如果要求得数精确到0.1，商应除到①十分位②百分位③千分位3、下面算式中，结果最大的是①4.2X0.9②4.2F1.3③4.2X0.45④4.2*0.454、一根木棒锯成三段需要15分钟，锯成四段要①20分钟②15分钟③22.5分钟五、用竖式计算：0.56X0.8=.8*11=六、求未知数x：xX6.2=1.8*x=19.x*1.8=2.6七、计算下面各题，能简算的要简算6.25*0.25X8.04*0.486＋0.01＋3.919.75*2.5-3.5517.5X2.3-7.5X2.390*25*4八、列式计算：1、3个9.5比15多多少？2、比3.5的2.4倍还多1.2的数是多少？3、0.8与0.9的积除以1.2，商是多少？4、78减去3.4与0.17的商，差是多少？九、应用题：1.25X11X4X0・・93X5.7+8.93X3.3＋8.931、学校参加团体操大赛，四年级有80人，五年级的人数是四年级的1.5倍，两个年级一共有多少人参加团体操大赛？、用载重为3.5吨的货车5辆，运122.5吨货物，要几次运完？、一辆汽车0.5小时行驶15.2千米，照这样计算，行驶228千米需要多少小时？、开学五年级一班布置教室，用去纸4张，每张2.8元，用去胶水两瓶，每瓶1.4元，一共用去班费多少？5、从学校到少年宫共有3.6千米，一辆汽车行这段路程共用了6分钟，请问这辆汽车每小时行多少千米？6、某同学在算一道除法题时，把一个有两位小数的被除数的小数点漏掉了，除以1.8后商是230。请你写出正确的除法算式，并计算出商。精品文档精品文档PAGE\*MERGEFORMAT#/12PAGE\*MERGEFORMAT#/125・6X2・93・77X1・0・02X965・22X0・・99X0・02・67X0・95X2.441.666X6.1.432X0.002.6X6.4.88X2..61X4.38.9X2.4.5X559.77X0.01.384X5.1・78X82.6X610・059X0・2・268X1・7X5・9・46X2・8517・8X6・41・5X4・92・5X0・85・555X5・2・22X3・337・658X856・02X0・56・78X8除法：85・44=1642・84=101・7=967・5=15230・4=621・24=360・736=243.5*12.21*39.6*246.21*0.0210=1.451.3=0.91.2=3.0.756*0・180・66*0・11・97*1・569・6*2.938・4*0・815*0・068・2*0・10・8*0・6・4*5・・7*1・25*1・2*4214・36*2・78・33*6・1・7*0・02・41*0・7精品文档0.396*1.2二0.756=0.36二15.6X13=精品文档0.396*1.2二0.756=0.36二15.6X13=PAGE\*MERGEFORMAT#/12PAGE\*MERGEFORMAT#/12用竖式计算0.18X15=0.025X14二.06X36二0.04X0.12=3・84X2.6~・76X3=.15X2290.75*3.3.68X0.2516.9*0.11.55*3.93.7X0.01613.76X0.8=.2X0.68.4X1.36.4X0..48X0..25X55.4X4.20.042X0.50.76X0.320.25X0.0462.52X3.1.08X20.12X0.5X0.16=8X0.25=0.125X1・4心2.5*0.7=10.1*3.3=10.75*12.5=.25X9.04=3、脱式计算2.5X7.1X416.12X99＋16.12.2X0.9＋0..28X99+7.284.3X50X0.64－2.64X0.526X15.7＋15.7XX0.283.94+34.3X0.1.2X*4.8.9X1.1X4.2.7X5.4X3.93.6X9.85-5.4.05X3.4+7..58X4.5X0..8X0.5+1.52＋4.9－0..8－4.8X0.5X84.8X100.16.5X99＋56.5.09X10.8－精品文档0.45X2.5=0.810X0.07=0.30.2X0.26=精品文档0.45X2.5=0.810X0.07=0.30.2X0.26=精品文档PAGE\*MERGEFORMAT#/12PAGE\*MERGEFORMAT#/12PAGE\*MERGEFORMAT#/120.8X7.094.8+0.3三1.48.X17.—.X.412.5X0.4X2.5X80.87X3.16+4.69.5X1010.6*X1.240.=0.81X0.18X.81+6.81X90.25X185X40.4X0.8－3.4X0.X．52.37X6.3+2.37X3..5X1.25X0.3.8X10.12.5X.69X101.8X10.10.25X39+0.0.125X76X0.33+54X0.33X1.6.81+6.81X90.25X185X406・8X0・75*0・・75*0・125—2・71.53+23.4=7.29.5X913.5X0.9812.5X8.8小学五年级数学上期计算练习题集TOC\o"1-5"\h\z2.14－0.9=0.5+7.6=240=48=00=300=0.75－0.38=6+99=0X30=20X35=1－0.2=3－2.25=1.57+3.43=286+199=18.54－9.9=X99=.4=2=48=0.6==3=0.24=0.2=.8=6=0.96=0.03=.4=0.2=.83.24=0.24=.2496=3=0.242.4=0.2=.822.8=3=.9832=42=246.45.3+6.7=.4-3.6-1.4=012.9-8.5=.2286+198=14-202=526+301=23-99=0・140・2X0・4=8・22・5X0・4=2.40.9—0・52=.998=10=10-1.8-7.2=0.43+3.57=2.50.9X0.8=.5x-3x=a+3a+7a=1.051=0.5=0.960.16.5X10=0.563.215X100=0.80.6X0.=312.5X8=00.16X5=1.780.7=0.01=2.53.9+2.03=.227+456+73=0.312=0.3二・871.5X0.4=7=0.6=.6=2.4=.4=0.2=.8=0.6=.6=0.23=19.76=13=.17X0.4=.8X1.25=0.3X1.4=0.05X4=0.02+1.8=100X5=0.22X1=0=3=1.47X100=.78X10=4.08X0.9=.5X0.04=0+2.=9.6X0.4=12=3.5=X0.3=.2=0.7=13=0.25=.5=0.3=.24=2=48=6=0.96=0.3=5.8=5.2=.81=0.7=0.4X0.01=15X1.4=+2-8+2=X3.6=0.3X7=0.92X0.1=1.2—35.22=.3X4=.25X3.52=12.5=0.7=5.4X100=4X100=1.1X0.4=.6X0.=1.1=0.=1.2—3.9=.61.6+2.4X0.3=.14+2.8=0.9=4=0.96X0.7X0.8==24==0.6==0.03==6==7==0.01==1.5=X0.3=X0.4=X0.3=X4=X0.5=X8=X4X12=X100==6==0.8=X0.=X0.4=X9=X0.5==0.66=—0.9==0.01==0.3=—2.5=16=1.6=.6X1.01=0.36+0.64=4.32=16=.2=0.1=72.8=0.8=8.4=4.2=13.8+9.9=.4X2.5=精品文档0.25X0.25=.5X9.04二12.5X0.6=.9*29二18.72=3二1.47*0.6二・6*0・4=*0・005=81*2.5二精品文档0.25X0.25=.5X9.04二12.5X0.6=.9*29二18.72=3二1.47*0.6二・6*0・4=*0・005=81*2.5二精品文档0.05X0.8=2.56—0.37=12X2.5=1.23X3=.2*1.6=.5+3.5X3=19.6*2=.8*2.2=0.75X4=PAGE\*MERGEFORMAT#/12PAGE\*MERGEFORMAT#/12PAGE\*MERGEFORMAT#/120.5X0.8=.4X0.2=1.6X0.2=7.2X0.3=.8X0.3=0.9*0.15=1.8X0.4=.5*0.55=0.08X100=2.2*0.11=.46＋4.54=12.52.8X4=19.60.756*0.36=15.63.06X36=0.047.15X22=0.751.55*3.9=3.78.4X1.3=.435.4X4.2=0.0422.52X3.4=1.0810.1*3.3=10.750.43X0.28=.453.08X0.43=1.513.95*3.1=.5X4X12=0.91.05X100=15.4*6=12865*0.05=442*0.003=787.2*0.002=10007.5*5=8.62.5*0.005=0.368.6*0.0043=69.8*0.7=.6133*.0007=.055.6*700=6018.63*0.03=.50.29*2.9=3.47.09X10.8=0.8X0.8=0.35*4=22.5X13=0.18X0.12=.84*3.3=3.68X0.016=13.76X0.5=.48X0.54=0.76X25=.8*12.5=.25X0.73=4.6X26.7=.22*10=10-1.8-7.2=0.43+3.57=X0.8=.5x-3x=a+3a+7a=*0.5=0.96*0.4=*0.12=*0.06=5*1.25=10*0.002=0.0036*0.0006=.5*0.0023=8.4*0.023=0.009*0.5=123000*0.008=4.329X99=13.5X0.2=0.57X7.09=.5X0.3=1.4X4=0.396X15=0.025X2.6=5.76X0.2=16.9X0.8=.2X0.4=5.25X0.32=120=3.6=.6=2=6.3=0.0084=1.28*0.005=39*1.23=0.00125*6=92X0.98=0.1-0.047=*19=3+124+76=X101=.8X5=*1.2=X14=X3=*0.13=X0.6=X5=X0.046=*0.7=X8.8=X0.05=*3.6=*0.7=*3.2=*0.18=*0.03=*0.024=*2=*21=*3.2=*0.0003=*50=*0.004=X10.1=7.69X101=3.8X10.1=0.125X72=7X19+7=2.8*3=.98*0.23=19.76*5.2=.81*7=2*42=246.4*13=.17*0.7=0.4*0.01=.3+6.7=.4-3.6-1.4=0X0.01=15*1.5=12.9-8.5=.2X0.4=.8X1.4=+2-8+2=86+198=14-202=526+301=23-99=0.45X2.5=0.8X1.25=0.3X3.6=0.3X0.3=10X0.07=0.3X1.4=0.05X7=0.92X0.4=0.2X0.26=0.14X4=0.02X0.1=1.2X0.3=0.2X0.4=8.2＋1.8=100－35.22=.3X4=.5X0.4=2.4X5=0.22X4=.25X0.5=0.9－0.52=.99X1=0X3.52=12.5X8=.4－2.5－1.4=.5X1.25X0.32=12－6.2－3.8=*5=1.7+0.43+3.3=5X25X4=精品文档精品文档58.8**0.02=10.4—7.79三二.6FX5二13.7X0.25PAGE\*MERGEFORMAT#/12PAGE\*MERGEFORMAT#/12250—250*5=70+50*50+70二13.7+0.98+0.02+4.3二TOC\o"1-5"\h\z18.6—3.47—0.53=2X101—72=35X28—35X28=.6X78+78X7.4=.26-二X=1.25X0.8X0.5=*54=1210.5*=6.25+3.85-2.125+3.875=3.375+5.75+2.25+6.625=.1X4.3+5.7X2.1=.3756.54+2.4+3.46+0.6=5.61.5X4.2—0.75*0.25=.270.25X80—0.45*0.9=.4+2.47.5-5.7X1*3=12.37-3.25-6.75=16X6.8+2.2X16+16=58.7-16.650.4X4.7X2.5+=.31-1.125-7.875=00X=1.2X=1.530.6*=.7+3.913.12X=.2+9.7282.4X0.75＋1.25*2.5=*2.5=.48101X0.36*=10.5*+18.25=.111025—1125*4.5X3.6=0.875X36+4.05*8.1=30*=*3.6＋85.7=X28.4=0.1X6.3+2.37X3.7=＋0.625)X0.28=—=X72=*=*0.034=X0.97+0.97X6.625=X1.8+95.6X8.2=X+3.27X5.7=X=*3.7=X*4.8=X=*=*3.2X1.5=20.2X0.6—2.12)*0.1=*0.8X0.9=*0.3X8.5=—0.72X*0.16=*1+1*0.8—0.1=—14.88*2.4=*4=—3.7*4=.6X1.25+0.32*0.4=0.8X=.5X=.2X=.4*X0.8=19.28＋1.82*0.7=10.56X3.75—3.75X0.56=*0.4=*0.042=*0.-.05=.27*0.25=1.08*1.7=1.461.52—1.6X5＋5.7=.818.64—4.35X2＋20.9=0X^0.1=1.6X=0.06X^2=17・6819・8+*2・3=・6+15・41.5X1・2—0.6*2.4=0.64.32X15*12＋5.1*0.85=.68.7-.74*23+700X0.03=0.38+9.624.38*=1.6X=.026.5X+2.98=4.75+8.44.5X+9.23=.4+X0.8+4.32=.11X2.75—0.9=14.78＋0.22X20*16=31.710—7.5X=4.2X+.3=2.717.2-4.5X3.6)*0.32=X=*=X5+12.8*0.4X7.5=＋=—2.5X4*8=X*0.92=.5+1.3X6)*1.5=X*1.2=X=—8.2X=＋8.4X1.5*0.18=0.2X0.6—2.8]*0.4=*5.2+2.7X1.5=*0.4X1.4=X=X=*3.7X5.4=.84-3.9)*0.4+0.15=X1.027*0.26)=*=*0.23)=＋6.5X=—0.72X=—0.5X0.7—1.65=2.95＋10.58—1.53)*0.25=*+.3X0.25=（（（（