五年级上册数学单元测试-4.小数混合运算一、单选题1.(5.2－5.2)÷0.8＝（  ）A.  10.2                                      B. 5.4                                      C. 1.74                                      D. 02.  38.4除以6.4的商再减去2.7与0.3的积，差是（  ）A.  6                                      B. 5.19                                      C. 0.81                                      D. 51.93.16.85÷0.5－16.92＝（  ）A.  14.3                                   B. 16.78                                   C. 24.2                                   D. 1.684.1.2+1.2﹣1.2+1.2=（ ）A. 0                                            B. 2.4                                            C. 3.65.4.4×0.5×0.2＝（  ）A.  4                                       B. 13.7                                       C. 0.44                                       D. 266.8个0.1和72个0.01合在一起是（ ）A. 1.2                                       B. 80                                       C. 0.8                                       D. 1.527.5.4×0.1×10＝（  ）A.   10.2                                      B. 5.4                                      C. 1.74                                      D. 08.1.1÷（0.5＋3.15÷0.3）＝（  ）A.  0.1                                        B. 1.2                                        C. 0.5                                        D. 79.能简算的要用简便方法计算.4.42÷(0.25×6.8)＝（  ）A. 0.026                                      B. 2.6                                      C. 26                                      D. 0.2610.3.5×（9.04－14.4÷3.6）＝（  ）A.  6.2                                     B. 17.64                                     C. 41.5                                     D. 44二、判断题11.判断对错．9.8＋0.2×9.8＋0.2=(9.8＋0.2)×212.判断对错．2.5×0.4÷2.5×0.4=1÷1=113.判断对错．9.2×3.8＋9.2×62=9.2×(3.8＋6.2)=9.2×10=9214.小数四则运算的顺序跟整数是一样的，整数四则运算的定律也适用于小数。15.在5.5－5.8÷0.2中，可以先算减法，再算除法。三、填空题16. 7.25＋56÷32－3.25=________17.4.7除22.56的商再乘6.4，结果是________18.请你帮收款机把下面的购物小票填写完整．(从上到下填写)  19.72×0.26÷6.5=________20.甲数是10.9，比乙数多0.852，甲、乙两数的和是________．21.1.1×2.1×0.5÷4.2=________22.怎样算简便就怎样算．0.125×8×3.2=________23.  12.81÷[(50.7－42.3)×0.5]=________24.计算(2.6＋1.65÷0.15)×0.12=________25.看图回答 四、计算题26.脱式计算（能简算的要简算）     ①26×15.7+15.7×24②（2.275+0.625）×0.28③64-2.64×0.527.脱式计算，怎样简便就怎样算。①63.35-4.75+5.25②3.89+2.67+0.15③8.1+6.93+1.9+0.07④46.5-（13.55+7.2）⑤20-12.64-3.36⑥39.74-（9.74+8.69）五、解答题28.列式计算．①5.2减去1.4的差除以，结果是多少？②一个数的25%比的2倍多0.4，求这个数．六、应用题29.某品牌出租车起步(3公里及3公里以内)价是6元，超过3公里而在7公里以内每公里按1.5元计价;7公里以上部分每公里再加价50%.旅客从西安火车站乘出租车到距离约8公里的“陕西省历史博物馆”，到达时应付多少车费?答案解析部分一、单选题1.【答案】D2.【答案】B3.【答案】B4.【答案】B5.【答案】C6.【答案】D7.【答案】B8.【答案】A9.【答案】B10.【答案】B二、判断题11.【答案】错误12.【答案】错误13.【答案】错误14.【答案】正确15.【答案】错误三、填空题16.【答案】5.7517.【答案】30.7218.【答案】4.20,10.80,10.80,25.80,4.2019.【答案】2.8820.【答案】20.94821.【答案】0.27522.【答案】3.223.【答案】3.0524.【答案】1.63225.【答案】8.1四、计算题26.【答案】解：①26×15.7+15.7×24=(26+24)×15.7=50×15.7=785②(2.275+0.625)×0.28=2.9×0.28=0.812③64-2.64×0.5=64-1.32=62.6827.【答案】解：①63.35-4.75+5.25=58.6+5.25=63.85②3.89+2.67+0.15=6.56+0.15=6.71③8.1+6.93+1.9+0.07=(8.1+1.9)+(6.93+0.07)=10+7=17④46.5-(13.55+7.2)=46.5-20.75=25.75⑤20-12.64-3.36=20-(12.64+3.36)=20-16=4⑥39.74-(9.74+8.69)=39.74-9.74-8.69=30-8.69=21.31五、解答题28.【答案】解：①（5.2﹣1.4）÷=3.8÷=9.5答：结果是9.5．②解：设这个数是x，由题意得：25%x=×2+0.425%x=1.6    x=6.4答：这个数是6.4六、应用题29.【答案】解： 6+(7﹣3)×1.5+(8﹣7)×1.5×(1+50%)=6+6+2.25=14.25(元)答：到达时应付14.25元的车费.