四年级数学含小数的脱式简便计算
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2016-04-30
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2012年1月28日星期六一、口算题小数加法:0.3+1.5=2.5+9.8=7.6+1.3=4.4+5.7=2.3+7.7=5.7+3.1=7.69+2.31=9.16+2.64=5.68+12.22=16.8+16.5=小数减法:6.8-3.8=4.26-3.71=0.88-2.12=5.34-69.21=68.4-61.5=9.58-3.7=18.94-5.66=15.69-9.78=115-68.59=48.21-18.95=小数乘法:5.69×2.56=3.68×9.86=5.87×12.6=7.89×22.56=6.87×9.68=89.4×25.5=14.6×22.69=78.56×36.9425.36×36.58=25.69×58.9=小数除法:1.4÷0.5=1.55÷0.5=3.15÷0.7=1.86÷0.2=1.04÷0.8=0.38÷0.1=1.36÷0.2=1.16÷0.4=0.12÷0.6=0.27÷0.9=二、竖式计算加法:25.9+7.82369.2+24.6832.56+2.1398.23+1928.35226.59+582.12减法:928.22-325.98726.13-36.66411.02-268.261000-236.5111.69-25.88乘法:135×5108×68×3127×210138×9除法:336÷21858÷39918÷27888÷37645÷32三、简便计算和脱式计算题:146+155+254+451762-73-127101×28四、应用题:1、实验小学三年级有4个班,每班40人,四年级总人数比三年级多19个人,三年级和四年级一共有多少人?2、学校有72个篮球,乒乓球比篮球多28个,足球比篮球和乒乓球的总数少32个,足球有多少个?2012年1月29日一、口算题小数加法:0.396+23.69=2.36+2.54=8.64+21.44=2.87+3.45=2.25+7.88=5.79+3.15=7.58+2.21=9.98+2.25=15.88+12.58=36.8+31.54=小数减法:26.12-15.8=34.26-3.98=320.12-2.98=25.4-12.56=68.4-61.5=59.58-3.79=18.01-5.56=15.12-9.78=110-68.36=48.01-18.56=小数乘法:5.23×2.56=3.25×9.86=5.58×12.6=7.12×22.56=6.21×9.68=89.69×25.24=4.6×2.69=8.56×36.9=5.36×6.58=28.9×12.59=小数除法:1.4÷0.5=1.55÷0.5=3.15÷0.7=1.86÷0.2=1.04÷0.8=0.38÷0.1=1.36÷0.2=1.16÷0.4=0.12÷0.6=0.27÷0.9=二、竖式计算加法:268.15+23.8423.5+783.4575.6+259.198.1+58.4465.48+98.1减法:95.45-25.87101.2-59.48300.54-58.1978.14-25.6500.02-57.15乘法:208×2436×137406×23460×23305×56除法:689÷34618÷88372÷45294÷29328÷42三、简便计算和脱式计算题:672-672÷12×7987÷(345-298)×65210×[520÷(240-227)]四、应用题:加工一批零件,计划每天加工24个,25天完成,实际20天完成,实际每天加工多少个零件?李大伯果园里共栽4行果树,每行15棵,一共摘了180筐,一棵苹果树摘苹果多少筐?2012年1月30日一、口算题小数加法:4.13+3.2=4.7+3.7=6.94+3.12=5.6+6.4=0.19+0.01=32.2+2.1=6.4+8.2=28.01+2.09=3.4+6.8=9.6+2.4=小数减法:245.6-48.94=200-25.15=801.2-75.14=225.15-39.48=71.12-58.36=87.2-12.15=205.13-64.51=107.06-95.86=15.06-5.9=58.21-38.98小数乘法:125×32=24×125=125×56=125×72=125×16=48×125=125×64=25×36=25×32=25×16=小数除法:8100÷300=7600÷200=7600÷400=300÷25=4000÷125=240÷5=600÷25=3200÷50=二、竖式计算加法:25.45+267.2858.14+569.2559.12+69.1498.54+89.1428.13+69.45减法:586.46-278.98605.22-589.5801.32-485.65589.5-254.87365.54-578.88乘法:208×24.836×137.6406×23.5460×23.2305.3×56.4除法:336÷21858÷39918÷27888÷37645÷32三、简便计算和脱式计算题:38×99+3875×299+75102×99+102四、应用题:一辆洒水车,每分钟行驶50米,洒水宽度是8米。洒水车行驶6分钟,能给多大的地面洒上水?一架飞机两小时飞行了1700千米,照这样计算,6小时飞行多少千米?2012年1月27日一、口算题小数加法:5.69+2.368.96+3.655.69+4.586.87+2.135.87+6.452.35+4.575.69+2.122.6+5.693.01+2.652.9+2.98小数减法:56.9-23.1587.21-59.658.1-4.6228.59-5.8712.36-8.47118.6-25.115.21-6.8927.23-8.7834.56-28.9824.56-20.59小数乘法:2.5×3.65.6×2.48.7×2.19.12×3.65.87×6.746.8×5.43.6×8.72.4×6.88.7×2.13.5×6.4小数除法:0.35÷0.013.92÷0.84.32÷0.90.24÷0.83.15÷0.70.14÷0.515.5÷0.53.15÷0.71.86÷0.021.04÷0.08二、竖式计算加法:68.59+59.1268.98+79.85.89+14.6889.74+58.8928.96+54.12减法:587.01-58.45178.21-98.54201.1-58.4858.62-58.2887.53-57.24乘法:58.12×25.658.5×34.824.56×67.1568.9×32.1297.28×58.4除法:432÷46966÷23731÷79980÷28828÷36三、简便计算和脱式计算题:210+405÷9×124020÷20-18×112.5×0.23×4四、应用题:1.一辆汽车平均每小时行75千米,照这样的速度,这辆汽车从甲地到乙地行驶了2.7小时,甲乙两地大约相距多少千米?(得数保留整数)2.图书室中有童话书134本,作文书的本数是童话书的2.5倍,图书室中的童话书和作文书一共有多少本?2012年1月26日一、口算题小数加法:5.66+3.785.89+6.786.23+6.548.97+5.8789.87+5.86.89+9.8783.5+8.786.98+75.56.87+5.126.78+56.12小数减法:12.21-5.8716.87-25.9810.5-8.7811.56-9.238.7-3.698.7-5.4511.08-5.4910.56-6.823.5-18.237.5-26.9小数乘法:2.5×63.6×5.86.8×2.53.6×2.13.8×7.88.5×3.65.8×4.73.9×2.71.9×6.84.7×6.7小数除法:0.72÷0.034.8÷0.212.12÷0.30.24÷0.080.98÷0.731.5÷0.070.9÷0.030.72÷0.090.18÷0.30.36÷0.06二、竖式计算加法:234.58+59.7836.54+269.555.78+584.416.89+215.55365.18+98.25减法:652.1+584.56692.1-245.87365.1-250.87568.18-397.5998.54-25.15乘法:25.6×36.5658.78×25.43.66×5.875.12×3.456.7×8.79除法:180÷30=720÷30=360÷30=920÷40=780÷60=960÷40=三、简便计算和脱式计算题:1.25×4.83.7×1027.8×99四、应用题:1公顷松柏林每天分泌杀菌素30千克,24.5公顷的松柏林31天能分泌杀菌素多少千克?2.修一条水渠,原计划每天修0.24千米,实际每天比原计划多修0.06千米,12天后还差0.4千米没有修,这条水渠共有多长?2012年1月25日一、口算题小数加法:2.35+6.983.45+1.693.65+5.785.89+2.126.89+2.456.45+5.125.45+6.825.8+3.482.12+6.486.14+6.45小数减法:12.52-5.193.31-2.5618.32-9.5487.21-6.2113.01-9.5456.85-6.876.45-5.899.12-9.9815.24-8.9828.23-5.9小数乘法:2.3×3.53.6×5.45.8×9.56.9×4.56.7×9.16.8×1.36.8×9.55.9×4.23.8×5.72.6×8小数除法:1.8÷0.37.2÷0.033.6÷0.090.36÷0.040.36÷0.035.2÷0.47.8÷0.28.8÷0.045.6÷0.094.8÷0.07二、竖式计算加法:12.5+256.428.45+69.2336.56+98.4587.52+69.169.8+59.12减法:116.5-26.45201.5-25.95521.36-56.47119.45-548.12235.1-56.94乘法:25.6×4.65258.12×5.845.12×57.6468.12×59.4667.34×97.12除法:432÷24=625÷23=837÷43=850÷17=780÷26=544÷17=三、简便计算和脱式计算题:4.6×7.3+7.3×5.42.9×3.5+3.5×6.13.5×102四、应用题:1.买了1.5千克香蕉和1.8千克苹果,1千克苹果的价钱4.6元,1千克香蕉比苹果贵1.4元,一共要付多少钱?2.用激光测远距离既精确又迅速,一次从地球上向月球发射激光讯号,约经过2.56秒收到从月球反射回来的讯号,已知光每秒传播300000千米,算一算月球和地球的距离是多少?2012年1月24日一、口算题小数加法:8.12+6.455.91+6.455.47+6.786.45+3.173.65+8.4712.4+58.148.19+3.648.64+5.978.31+5.972.9+6.94小数减法:28.12-13.4538.31-9.7897.12-58.3178.14-26.48.97-5.9144.15-24.9818.31-9.2918.31-5.8211.16-9.1514.97-8.31小数乘法:2.3×4.52.6×4.94.8×2.18.1×6.95.9×0.88.1×0.130.12×2.14.5×3.50.8×7.10.4×5.7小数除法:1.6÷0.80.14÷0.70.18÷0.94.9÷0.070.42÷0.67.2÷0.090.56÷0.78.1÷0.091.5÷0.50.32÷0.8二、竖式计算加法:25.6+482.215.13+6.498.89+12.5487.23+983.3152.64+92.54减法:301.23-264.515.23-9.59426.12-253.18100.01-58.1389.12-54.37乘法:0.25×2.6815.45×68.1258.21×48.3178.23×28.975.9×8.79除法:520÷40=920÷23=864÷32=840÷24=704÷44=三、简便计算和脱式计算题:4.63×4×0.50.25×8.43.7×12.5+4.3×12.5四、应用题:1.甲乙两车从A、B两地同时相对开出,甲车每小时行驶63.5千米,乙车每小时行驶56.5千米,4小时后两车相遇,A、B两地相距多少千米?2.修路队前3天共修路3.6千米,后4天平均每天修1.85千米,这一周修路队共修路多少千米?2012年2月1日一、口算题小数加法:5.87+6.98.7+5.68.9+4.64.9+8.72.6+4.58.15+6.52.1+6.57.8+1.39.5+4.63.4+8.9小数减法:15.2-2.641.8-5.63.6-1.57.9-5.818.9-6.818.45-6.917.31-5.96.4-4.73.6-2.456.87-2.45小数乘法:2.2×0.84.5×0.96.7×0.50.8×0.150.9×4.57.8×0.60.9×0.151.8×0.70.78×0.23.5×0.9小数除法:6.3÷0.77.4÷0.26.9÷0.31.5÷0.32.5÷0.052.7÷0.096.4÷0.82.8÷0.71.2÷0.042.4÷0.06二、竖式计算加法:154.89+52.4578.13+58.6497.5+98.2464.54+82.1595.12+78.13减法:157.21-25.48110.5—58.94110.01-54.0357.98-25.45102.11-25.9乘法:2.5×2.45.8×6.759.12×1.580.13×5.82.5×1.6除法:480÷3.2693÷0.03255÷0.578.2÷0.0296.3÷0.03三、简便计算和脱式计算题:250×247.8×10515.6×5+15.6×4四、应用题:1.打字员小李每分钟打字45个,小李1小时20分钟可以打字多少个字?2.5个工人6天修路900米,平均每个工人每天修路多少米?(两种分步写小标题解答。)
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1.45+2.42+5.58+5.55=(1.45+5.55)+(2.42+5.58)=6+8=14
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2020-02-01
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𝚛b 1 4。𝗖 c
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难。【译文】:知道自己的过错并不难,改正过错才是难的;说好话并不难,做好事才是难的。8.无纾目前之虞,或兴意外之变。人者,邦之本也。财者,人之
逛阉哙挋姃啈
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难。【译文】:知道自己的过错并不难,改正过错才是难的;说好话并不难,做好事才是难的。8.无纾目前之虞,或兴意外之变。人者,邦之本也。财者,人之
逛阉哙挋姃啈
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2016-04-30
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什么鬼
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