乘法運(yùn)算定律與簡(jiǎn)便計(jì)算練習(xí)題大全

(二)乘除法運(yùn)算定律.乘法交換律定義：交換兩個(gè)因數(shù)的位置，積不變。字母表示： abba例如：85X18=18X85 23X88=88X23.乘法結(jié)合律定義：先乘前兩個(gè)數(shù)，或者先乘后兩個(gè)數(shù)，積不變。字母表示： (ab)ca(b乘法結(jié)合律的應(yīng)用基于要熟練掌握一些相乘后積為整十、整百、整千的數(shù)。例如：25X4=100, 125X8=1000例5.簡(jiǎn)便計(jì)算:25X9X425X1225X9X425X12(3)125X56舉一反三：簡(jiǎn)便計(jì)算(1)25X16(2)125X33X8(3)32X25X125(4)24X25X12548X125X6325X15X163.乘法分配律定義：兩個(gè)數(shù)的和與一個(gè)數(shù)相乘，可以先把它們與這個(gè)數(shù)分別相乘，再相加。字母表示：(ab)cacbc,或者是a(bc)abac簡(jiǎn)便計(jì)算中乘法分配律及其逆運(yùn)算是運(yùn)用最廣泛的一個(gè)，一個(gè)要掌握它和它的逆運(yùn)算例6.簡(jiǎn)便計(jì)算：(1)125X(8+16) (2)150X63+36X150+150(3)12X36+120X42+12X220(4)33X13+33X79+33X12簡(jiǎn)便計(jì)算(二)一一加減乘除綜合簡(jiǎn)便計(jì)算除了乘法分配律經(jīng)常單獨(dú)使用外，大多數(shù)的簡(jiǎn)便計(jì)算都同時(shí)包括了加減法、 乘除法的運(yùn)算定律率，看下面例題：例7.利用乘法分配律計(jì)算：(1)88X(12+15) (2)46X(35+56)例8.簡(jiǎn)便計(jì)算:(1)97X15(1)97X15(2)102X99(3)35X8+35X6-4X35例9.簡(jiǎn)便計(jì)算：(1)48X1001 (2)57X99 (3)539X236+405X236+236X56例10.簡(jiǎn)便計(jì)算:(1)125X25X32(2)(1)125X25X32(2)600-25-40(3)25X64X125例11.簡(jiǎn)便計(jì)算:17X62+17X31+12X178.例11.簡(jiǎn)便計(jì)算:17X62+17X31+12X178.X36+567X36+36X341+36例12.簡(jiǎn)便計(jì)算:(1)16X56-16X13+16X61-16X5(1)16X56-16X13+16X61-16X5(2)43X23+18X23-23X9+481X230隨堂練習(xí)：簡(jiǎn)便計(jì)算(1)63+71+37+29(2)85-17+15-33 (3)34+72-43-57+28(1)63+71+37+29(10)22X46+22X59-22X2(10)22X46+22X59-22X2(11)175X463+175X547-175(4)99X85(5)103X26(6)97X15+15X4⑺25X32X125(8)64X25X125(9)26X(5+8)

26X35+26X450+260X19+26X382X470-82X13+820X68課堂練習(xí)：簡(jiǎn)便計(jì)算(1)36X84+36X15+3669X26X35+26X450+260X19+26X382X470-82X13+820X68課堂練習(xí)：簡(jiǎn)便計(jì)算(1)36X84+36X15+3669X170+17X28+17X3071X15+15X22+15X12(4)26X19+26X56+27X264.除法交換律、結(jié)合律類似于加減法的運(yùn)算定律，除法的交換律和結(jié)合律是由乘法的運(yùn)算定律率衍生出來(lái)的。除法交換律：從被除數(shù)里面連續(xù)除以兩個(gè)數(shù)，交換這兩個(gè)除數(shù)的位置商不變。字母表示：abcacb例13.簡(jiǎn)便計(jì)算：1000-25-8除法結(jié)合律：從被除數(shù)里面連續(xù)除以兩個(gè)數(shù)，等于被除數(shù)除以這兩個(gè)數(shù)的積。字母表示：abca(bc)例14.簡(jiǎn)便計(jì)算：100+2.5+4舉一反三：簡(jiǎn)便計(jì)算(1)80+5+4 (2)100-125-8 (3)100-8-25課后作業(yè)：用簡(jiǎn)便方法計(jì)算(2)978-156-244(2)978-156-244(3)24X25(4)99X3(5)103X37(6)125X(100-8)(7)30+25+4 (8)600-8-125(9)13X57+13X32+13X13(10)104X45-958-142四年級(jí)上冊(cè)簡(jiǎn)便運(yùn)算一、運(yùn)算定律及性質(zhì)1、加法交換律：a+b=b+a2、加法結(jié)合律：(a+b)+c=a+(b+c)2、乘法交換律：axb=bxa4、乘法結(jié)合律：(axb)xc=ax(bxc)5、乘法分配律：(a+b)xc=axc+bxc6、減法的性質(zhì)：①a-b-c=a-(b+c) ②a-b-c=a-c-b7、除法的性質(zhì)：①a+b+c=a+(bxc)②a+b+c=a+c+b二、應(yīng)用運(yùn)算定律及性質(zhì)例子1、加法①45+32+55=45+55+32=100+32=132②63+28+72+37=63+37+28+72=(63+37)+(28+72)=100+100=2002、減法?145-36-45=145-45-36=100-36=64=24X(100+2)=24X(100+2)②283-56-44=283-(56+44)=283-100=183@197-(42+97)=197-97-42=100-42=583、乘法①25X13X4=25X4X13=100X13=1300②125X32X25=125X(8X4)X25=(125X8)X(4X25)=1000X100=100000③24X102=34X(99+1)=34X(99+1)=24X100+24X2=2400+48=2448@21X99=21x(100-1)=21x100-21x1=2100-21⑤(25+3)X4=25X4+3X4=100+12=112@56X23+44X23=(56+44)X23=100X23=2300?178X45-45X78=(178-78)X45=100X45=4500⑧34X99+34=34=34x100=34009)78x12+21x12+12=(78+21+1)X12=100X12=12004、除法①3000+125+8=3000-(125X8)=3000-1000=3②810+18=810-(9X2)=810-9-2=90-2=45③720+18+4=720-(18X4)=720-72=10④630+(21X2)=630-21-2=30-2=15三、加減湊整法①145+201=145+200+1=345+1=346②234+98=234+100-2=334-2=332③163-102=163-100-2=63-2=61@236-199=236-200+1=36+1=36+1第一種第一種84x101504x2578x10225x204第三種99x6499x16638x99999x99第五種125X32X825X32X12588X12572X125四年級(jí)下冊(cè)簡(jiǎn)便計(jì)算歸類總結(jié)簡(jiǎn)便計(jì)算第二種(300+6)x1225x(4+8)125x(35+8)(13+24)x8第四種99X13+1325+199X2532X16+14X3278X4+78X3+78X3第六種3600+25W8100-4^753000-1251250+25W第七種1200-624-762100-728-772273-73-27847-527-273第八種278+463+22+37732+580+2681034+780320+102425+14+186第九種214-(86+14)787-(87-29)365-(65+118)455-(155+230)第十種576-285+85825-657+57690-177+77755-287+87第十一種871-299157-99363-199968-599第十二種178X101-17883X102-83X217X23-23X735X127-35X16-11X35第十三種64-(8X2)1000-(125X4)第十四種375X(109-9)456X(99+1)容易出錯(cuò)類型（共五種類型）

600-60T5736-35X2098-18X5+25280-80-4175-75e580-20X2+6036-36h-6100+45-100+45100+1-100+11000+8-1000+8102+1-102+125+75-25+7520X4-20X425X4+25X456X8+56X820X4-20X425X4+25X456X8+56X812X6-12X625X8+25X836X9+36X925X8+(25X8)15X97+348X99+15+95X2865+35X1340+360-20-10672-36+64324-68+32100-36+64四年級(jí)運(yùn)算定律與簡(jiǎn)便計(jì)算練習(xí)題一、判斷題。TOC\o"1-5"\h\z1、27+33+67=27+100 ( ) 2、125X16=125X8X2 ( )3、134-75+25=134-(75+25) ( )4、先乘前兩個(gè)數(shù)，或者先乘后兩個(gè)數(shù)，積不變，這是乘法結(jié)合律。 ( )5、1250-(25X5)=1250+25X5 ( )二、選擇(把正確答案的序號(hào)填入括號(hào)內(nèi)) (8分)1、56+72+28=56+(72+28)運(yùn)用了( )A、加法交換律B、加法結(jié)合律C、乘法結(jié)合律D、2、25X(8+4)=( )A2、25X(8+4)=( )A、25X8X25X4B、25X8+25X4C、25X4X8D、25X8+43、3X8X4X5=(3X4)X(8X5)運(yùn)用了( )A、乘法交換律B、乘法結(jié)合律C、乘法分配律D、乘法交換律和結(jié)合律4、101X125= ( )A、100X125+1B、125X100+125C、125X100X1D、100X125X1X125三、怎樣簡(jiǎn)便就怎樣計(jì)算(35分)。TOC\o"1-5"\h\z355+260+140+245 102X99 2X125 645-180-245 382X101-3824X60X50X8 35X8+35X6-4X35 125X32 25X46 101X5699X261022-478-422 987 -(287+135) 478 -256-144672 -36+64 36+64-36+64-368-132 1814 -378-422487-287-139-61500-257-34--368-132 1814 -378-42289X99+89 155+264+36+44 2589X99+89 155+264+36+44 25X(20+4) 88X225+225X12698-291-9568-(68+178) 561 -19+58 698-291-9568-(68+178) 561 -19+58 382 +165+35-82 155+256+45-98236+189+64759-126-25925X79X4569-256-44216+89+1157X125X8219X9937X98129X101—1291050-15-758X1019X123—23X169149X69—149+149X327200-24-3076X10278X46+78X759-126-25925X79X4569-256-44216+89+1157X125X8219X9937X98129X101—1291050-15-758X1019X123—23X169149X69—149+149X327200-24-3076X10278X46+78X5437X99+3756X51+56X48+5616125X25X3224X25125X48514+189—214369-256+156732—254—56X25X4X12524X73+26X2416X98+32512+(373—212)228+(72+189)169+199125X48514+189—214369-256+156732—254—56X25X4X12524X73+26X2416X98+32512+(373—212)228+(72+189)169+199109+(291—176)四、應(yīng)用題。（14分）1、雄城商場(chǎng)1—4季度分別售出冰箱269臺(tái)、67臺(tái)、331臺(tái)和2331、雄城商場(chǎng)多少臺(tái)?2、第三小組六個(gè)隊(duì)員的身高分別是128厘米、136厘米、140厘米、132厘米、124厘米、1272、第三小組六個(gè)隊(duì)員的身高分別是米。他們的平均身高是多少?五、應(yīng)用題（31分）1.一臺(tái)磨面機(jī)每小時(shí)磨面800千克，照這樣計(jì)算,6臺(tái)磨面機(jī)5小時(shí)能磨面粉多少千克？（用兩種方法解答）2.一堆煤共800噸，用5輛卡車，16次可以運(yùn)完，平均每輛卡車每次運(yùn)幾噸??一輛汽車6小時(shí)行了300千米，一列火車6小時(shí)行了600千米，火車比汽車每小時(shí)多行多少千米？.向陽(yáng)小學(xué)氣象小組一周中，測(cè)得每天的最高氣溫分別為： 31、31、34、32、33、30、33度.這■周最局平均氣溫是多少度？二、列式計(jì)算（20分）96減去35的差，乘63與25的和，積是多少？2727除以9的商與36和43的積相差多少？3與9的差除336與474的和，商是多少？一個(gè)數(shù)比96與308的積多36,求這個(gè)數(shù).最大的兩位數(shù)與最小的三位數(shù)的和與差的積是多少？四年級(jí)簡(jiǎn)便計(jì)算題集（100道）26X39+61X26 356X9-56X9 99X55+5578X101-78 52X76+47X76+76 134X56-134+45X134（乘法分配律的運(yùn)用）48X52X2-4X48 25X23X（40+4）999X999+1999（乘法分配律的綜合運(yùn)用）184+98695+202864-199738-301（加減法接近整百數(shù)的簡(jiǎn)算）380+476+120（569+468）+（432+131）（加法交換律和結(jié)合律的運(yùn)用）256-147-53373-129+29189-（89+74）456-（256-36）(減法的簡(jiǎn)算，重點(diǎn)：運(yùn)算符號(hào)變化的處理)28X4X25125X32X259X72X125(乘法交換律和結(jié)合律的運(yùn)用，重點(diǎn)：一個(gè)因數(shù)分成兩個(gè)因數(shù)的處理)720+16+5630+42(除法的簡(jiǎn)算)102X3598X42(乘法接近整百數(shù)的簡(jiǎn)算)158+262+138375+219+381+2255001-247-1021-232(181+2564)+2719378+44+114+242+222276+228+353+219(375+1034)+(966+125)(2130+783+270)+101799+999+9999+999997755-(2187+755)2214+638+2863065-738-1065899+3442357-183-317-3572365-1086-214497-2992370+19953999+4981883-39812X2575X24138X25X4(13X125)X(3X8)(12+24+80)X50704X2525X32X12532X(25+125)88X125102X7658X98178X101-17884X36+64X8475X99+2X7583X102-83X298X199123X18—123X3+85X12350X(34X4)X325X(24+16)178X99+17879X42+79+79X577300+25+48100-4-7516800-12030100-210032000+40049700+7001248+243150-154800-2521500-125158+262+138375+219+381+2255001-247-1021-232(181+2564)+2719378+44+114+242+222276+228+353+219(375+1034)+(966+125)(2130+783+270)+101799+999+9999+999997755-(2187+755)2214+638+2863065-738-1065899+3442357-183-317-3572365-1086-214497-2992370+19953999+4981883-39812X2575X24138X25X45.725.72(13X125)X(3X8)(12+24+80)x50704X2525X32X12532X(25+125)88X125102X7658X98178X10117884X36+64X8475X99+2X7583x102-83X298X199123X18-123X3+85X12350X(34X4)x325X(24+16)178X99+17879X42+79+79X577300+25+48100-4-7516800-12030100-210032000-40049700-7001248+243150-154800-2521500-1252356-(1356-721)1235(1780-1665)75X27+19X2531X870+13X3104X(25X65+25X28)(a+b)+c=a+(b+c)2.73+0.89+1.274.37+0.28+1.63+a—b—c=a—(b+c)-5.26-2.74 13.4 -(3.4+10-0.432-2.568 9.3-5.26-2.74 13.4 -(3.4+5.2)14.9-(5.2+4.9)18.32-5.47-4.32 17.29-5.28-6.29(axb)xc=a25x6.8x0.040.25X32X0.1256.4X1.25X12.525x6.8x0.040.25X32X0.1256.4X1.25X12.5cx(a+b)=ca+cb0.45x2010.58x10.150.2x994.7x9.90.45x2010.58x10.150.2x994.7x9.93.28X5.7+6.72X5.70.172.1x99+2.13.28X5.7+6.72X5.70.172.1x99+2.11.7X9.9+23x0.1+2.3x9.90.18 +4.26-0.18+4.260.58X1.3-0.58X1.37.3+4+2.7X0.253.75X0.5-23x0.1+2.3x9.90.18 +4.26-0.18+4.260.58X1.3-0.58X1.37.3+4+2.7X0.253.75X0.5-930-0.6+563.4+930-0.6+563.4+2.5+0.4(7.7+1,54)+0.72.75+25.26X0.125+2.74+8a+b+c=a+(bxc)12.8+(0.4x1.6)6.312.8+(0.4x1.6)(11.7+9.9)+0.9簡(jiǎn)便計(jì)算（加減法）

6.9+4.8+3.1 15.89 +(6.75-5.89)7.85 +2.34-0.85+4.6647.8 -7.45+2.5535.6-1.8-15.6-7.213.75 -(3.75+6.48)66.86-8.66-1.3447.8 -7.45+2.55乘除法:0.25X16.2X40.25X32X0.1252.5X(4+0.4)(1.25-0.125)X80.25X16.2X40.25X32X0.1252.5X(4+0.4)(1.25-0.125)X84.8X100.14.2X9956.5X9.9+56.55.4X11-5.43.83X4.56+3.83X5.443.83X4.56+3.83X5.447.09X10.8-0.8X7.09 3.65X4.7-36.5X0.3713.7X0.2513.7X0.253.7-410.7X16.1-1.1X10.7+10.7X54.9-1.43.9+(1.3X5)63.4+2.5-0.4(7.7+1.4)-0.7365+19924142X99+1421.25X0.5X8X2(12.5-0.05)X8計(jì)算10112.50.63+-+1.37+-11119.42-(1.36+2.42)（能簡(jiǎn)便的要簡(jiǎn)便）X992.5X12X2.85—2.85X2.42.758.485.592.5280x13X0.4+3.5X29-1.75X29—2.61-1.39(2.82—3.41)2.3X2.3X1.5X2112.74—1+2.26-9.87583.5X1.85.4+4.5+0.25X0.75+3x49 4 9(-+-)X12+12 197197X(3+3)3 7 28（二27 3681+14+17X(15(20+4)x27 10(32+；)+4”+5”x1050.57511 8 11X19+1.9X4.2513生+史24 16(21+-)1513:1316+7514123+15+7.6258 92T（十8X[39 41；)-(+5)+(-29.6 —1+3——3(--0.25)]101)-(+1)+(+51)3 4 3[2-(11.9-8.4X11)]+1.3 1.25X4.1+12.5X0.32+0.125X278151792295 73—1.832—12 122453.624245.41/7 、7-(L0.125)9 8(1123243 4 53-3-6.62568 9 944(36)494 96 12.383—7.6213 133 34.754.754-4—4.254 425X2X1.25X4X5X8101+98+105+55+102+104+97+95計(jì)算題測(cè)試1、Z與它的倒數(shù)的積減去0.125所得的差除以—，商是多少？12 182、比一個(gè)數(shù)的80胸12的數(shù)是45.6,求這個(gè)數(shù)是多少？3、甲數(shù)的75溢48,乙數(shù)是48的60%乙數(shù)比甲數(shù)少多少？4、某數(shù)分別乘以2和Q,兩次所得的乘積的和是17,求這個(gè)數(shù)。3 451 4 15、上與它的倒數(shù)的和減去」乘以f的積，所得的差除以—,結(jié)果是多少？12 8 3 206、一個(gè)數(shù)的21倍加上1.2等于2.4的］,求這個(gè)數(shù)。2 87、最小質(zhì)數(shù)的一半加上最小合數(shù)的-,和是多少？48、甲數(shù)是'，乙數(shù)比甲數(shù)少-,丙數(shù)恰好是甲乙兩數(shù)和的一半，丙數(shù)是多少？4 39、96個(gè)1比一個(gè)數(shù)的45%>7.8,求這個(gè)數(shù)。（列方程解答）810、一個(gè)數(shù)的4倍，減去這個(gè)數(shù)的80%差是6.4的25%這個(gè)數(shù)是多少？（列方程解答）四年級(jí)簡(jiǎn)便計(jì)算題集（100道）26X39+61X26 356X9-56X9 99X55+5578X101—7852X76+47X76+76 134X56-134+45X134（乘法分配律的運(yùn)用）48X52X2—4X4825X23X(40+4)84X0.25+16+42 19 14.432—3—15.5721 215 八15 43—48 53i39.377 5 7 51460.631417——14 —1111 1111999X999+1999（乘法分配律的綜合運(yùn)用）184+98695+202864—199738—301（加減法接近整百數(shù)的簡(jiǎn)算）1949+1959+1969+19+1979+1989+1999+2009380+476+120(569+468)+(432+131)(加法交換律和結(jié)合律的運(yùn)用)256-147-53373-129+29189-(89+74)456-(256-36)(減法的簡(jiǎn)算，重點(diǎn)：運(yùn)算符號(hào)變化的處理)28X4X25125X32X259X72X125(乘法交換律和結(jié)合律的運(yùn)用，重點(diǎn)：一個(gè)因數(shù)分成兩個(gè)因數(shù)的處理)720+16+5630+42(除法的簡(jiǎn)算)102X3598X42(乘法接近整百數(shù)的簡(jiǎn)算)158+262+138375+219+381+2255001-247-1021-232(181+2564)+2719378+44+114+242+222276+228+353+219(375+1034)+(966+125)(2130+783+270)+101799+999+9999+999997755-(2187+755)2214+638+2863065-738-1065899+3442357-183-317-3572365-1086-214497-2992370+19953999+4981883-39812X2575X24138X25X4(13X125)X(3X8)(12+24+80)X50704X2525X32X12532X(25+125)88X125102X7658X98178X101-17884X36+64X8475X99+2X7583X102-83X298X199123X18—123X3+85X12350X(34X4)X325X(24+16)178X99+17879X42+79+79X577300-25-48100-4-7516800-12030100-210032000+40049700+70012X2512X251248+243150-154800-2521500-125158+262+138375+219+381+2255001-247-1021-232(181+2564)+2719378+44+114+242+222276+228+353+219(375+1034)+(966+125)(2130+783+270)+101799+999+9999+999997755-(2187+755)2214+638+2863065-738-1065899+3442357-183-317-3572365-1086-214497-2992370+19953999+4981883-39875X24138X25X4(13X125)X(3X8)(12+24+80)X50704X2525X32X12532X(25+125)88X125102X7658X98178X10117884X36+64X8475X99+2X7583X102-83X298X199123X18-123X3+85X12350X(34X4)x325X(24+16)178X99+17879X42+79+79X577300+25+48100-4-7516800-12030100-210032000-40049700-7001248+243150-154800-2521500-1252356-(1356-721) 1235-(1780-1665)75X27+19X2531X870+13X3104X(25X65+25X28)(a+b)+c=a+(b+c)2.73+0.89+1.274.37+0.28+1.63+5.72a—b—c=a(b+c)10-0.432-2.568 9.3-5.26-2.74 13.4(3.4+5.2)14.9-(5.2+4.9)18.32-5.47-4.3217.29-5.286.29(axb)xc=ax(bx25x6.8x0.040.25x32x0.1256.4X1.25x12.5(a+b)=ca+cb0.45X2010.58x10.150.2994.7X9.93.28X5.7+6.72X5.72.1x99+2.11.7X9.9+0.1723X0.1+2.3x9.90.18+4.26-0.18+4.260.58X1.3+0.58X1.37.3+4+2.7X0.253.75X0.52.755.26X0.125+2.74(bxc)6.3+1.89.5-(1.9x8)12.8(0.4x1.6)930-0.6+563.4+2.5+0.4(7.7+1,54)+0.7(11.7+9.9)+0.9簡(jiǎn)便計(jì)算(加減法)6.9+4.8+3.1 15.89 +(6.75—5.89)7.85 +2.34—0.85+4.6635.6-1.8-15.6-7.213.75 -(3.75+6.48)47.8 -7.45+2.5566.86-8.66-1.34乘除法：0.25X16.2X4 0.25X32X0.1252.5X(4+0.4)(1.25—0.125)X84.8X100.1 4.2X99 56.5乂9.9+56.5 5.4乂11-5.43.83X4.56+3.83乂5.44 7.09X10.8—0.8乂7.09 3.65乂4.7—36.5X0.3713.7X0.25—3.7+4 10.7X16.1-1.1X10.7 +10.7X54.9+1.43.9+(1.3X5) 63.4+2.5+0.4 (7.7+1.4)+0.719.102X45-32823^50-12.5) 2525.6T10X47+6393.5>2.7-52.2/183.375X0.97+0.97>6.62595.6M.8+95.6>8.235.6-420/12>416/2+30/2+90/65000-105X3441X(1/2+1/3+1/4) 0(2442X(25+4)>40.81/0.25+5.96 5403+13X27+3.27X5.7(1.2+1.8)X4.51025—768+32—768+3281.2-11-7-X3=2/7X3/9卻7=6756-193-207=6696+62—6.5X10.6=2.8>3.1+16/824X2/5M/328-1/7X1/56.54+2.4+3.46+0.6344/3.6-5.40(250.15/0.25+0.75 1.23X63/21-8446.1.542—0.75田.250.25X80-0.45F.96696+62—6.5M0.6=97X360+3X360=3.27>450.102557.26-(5.26-1.5)11.9—2456X2113.375+5.75+2.25+6.625163.8X5.25+14.51.25*17.6+36.1/0.8+2.36*12.51.25*17.6+36.1/0.8+2.36*12.5=(5/4)*17.6+36.1*(5/4)+23.6*(50/4)=176/8+361/8+236/8=773/8=96.6257.5*2.3+1.9*2.57.5*2.3+1.9*2.5106.25+3.85-2.125+3.8755/11-4X2.75(15.1—9036)T8172.143+5.7>2.11125-997998+1246+9989 (8700+870+87)37125X8.81.3+4.25+3.7+3.7517.15—(3.5—2.85)3.4X99+3.44.8K010.4X(2.5號(hào)3)(1.6+1.6+1.6+1.6)X25(+—)+12.3-2.45-5.7-4.552+0.125X0.25>6464.2X87+0.642X130078X36+7.8>741—717+80.125X+0.52.42+4.58 —4325+1004.25-3-(2-1)=7.5*(1.9+0.4)+1.9*2.5=(7.5+2.5)*1.9+7.5*0.4=19+3=22(3)2004/2003*20052004/2003*2005=(2004/2003)*(2003+2)=2004+4008/2003(4)(4)276*543-267/276+543*275276*543-267/276+543*2751.125*3+125*5+25*3+252.9999*3+101*11*(101-92)3.(23/4-3/4)*(3*6+2)3/7 49/9-4/38/9 15/36+1/2712X5/6-2/938>5/4+1/463/8-3/864/7 5/9+3/7 5/95/2-(3/2+4/5)7/8+ (1/8+1/9)9-5/6+5/63/4 879-1/37-5/49+3/146X1/2+2/3)8-4/5+8 8/531 -5/6-5/69/7- (2/7-10/21)5/9 18-14>2/74/5 25/16+2/3 3/414-8/7—5/6￥2/1517/32-3/4-9/243-2/9+1/35/7 3725+3/73/14X2/3+1/61/5 273+5/69/22+1/11 1/25/3 11/5+4/345-2/3+1/3 157/19+12/19 5761/4+3/4 2/38/7 21/16+1/2101M/5-1/5-2150+160+4035.120-144+18+3536.347+45X2-4160芍2=543*(276+275)-267/276=543*551-267/27637(58+37)+(64-9X5)38.95+(64-45)39.178-1454X6+4240.812-700+(9+31X11)41.85+144(14+208+26)3.120-36M+18+35.(58+37)+(64-9X5).(6.8-6.8055)-8.546.0.12X4.80.12>4.847.(3.2XI.5+2.5)勺.648.6-1.64=5.38+7.85-5.37=49.7.2￡.8-1.25=6-1.1980.43=50.6.5X(4.8-1.24)=51.5.8X(3.87-0.13)+4.2X3.7452.32.52-(6+9.728+3.2)X2.553.[(7.1-5.6)>0.9-1.15] 2554.5.4程.6X(3.7-2.9)+0.62]55.12X6+(12-7.2)-656.12X6H.2-657.0.68>1.9+0.32M.958.58+370)+(64-45)59.420+580-64X21+2860.136+6X(65-345+23)15-10.75>0.4-5.762.18.1+(3-0.299田.23)M63.(6.8-6.8055)-8.564.0.12X4.80.12>4.865.(3.2XI.5+2.5)勺.666.3.2)6+(1.5+2.5)勺.667.0.68>1.9+0.32M.968.10.15-10.75 0.4-5.769.5.8X(3.87-0.13)+4.2X3.7470.32.52-(6+9.728+3.2)X2.571.[(7.1-5.6)>0.9-1.15] 2572.5.4程.6X(3.7-2.9)+0.62]73.12X673.12X6+(12-7.2)-674.12X6+7.2-675.33.02—(148.4—90.85)251)76.(25%-695%-12%)*3677./4*3/5+3/4*2/578.1-1/4+8/9/7/979.+1/6/3/24+2/2180./15*3/581.3/4/9/10-1/682./3+1/2)/5/6-1/3]/1/783./5+3/5/2+3/484.(2-2/3/1/2)]*2/585.+5268.32-256986.3+456-52*887.5%+632588./2+1/3+1/42)89+456-785%+.3/7 49/9-4/39￥5/36+1/272X5/6-2/933X5/4+1/494與/8-3/8695/7 5/9+3/7 5/96/2-(3/2+4/5)8+ (1/8+1/9)8-5/6+5/61/4 8/9-1/310-5/49+3/141.5X1/2+2/3)2/9X4/5+8僅/53.1 5/6-5/64/7- (2/7-10/21)19-18-14>2/75-25/16+2/3 3/44-8/7—5/6M2/157/32-3/49/241、2/3T/2—1/4>2/52—6/13%/26—2/32/9+1/2M/5+3/810-5/9+1/6>41/2X2/5+9/10刈/205/9X3/10+2/7-2/51/2+1/4>4/5-1/83/4X5/7>4/3-1/223—8/9XI/27T/278X5/6+2/5%1/2+3/4>5/12>4/58/9>3/4—3/8T/45/8芍/4+3/23圖/111.22.5+0.8>2.58.91.25-0.91.2512.57.4>0.89.96.4-(2.5+0.24)(27)6.5淘.5+6.5>0.50.35M.6+0.35>3.40.25X8.6>46.72-3.28-1.720.45+6.37+4.555.4+6.9>3-(25-2.5)2X41846-620-3804.8>46+4.8X540.8+0.8>2.51.25X3.6>8X2.5-12.52.428X12.5-12.52023.65-(3.07+3.65)(4+0.4X0.25)8X7X1.251.65>99+1.6527.85-(7.85+3.4)48X1.25+50X1.25>0.287.8>9.9+0.78(1010+309+4+681+6)X123X9146X782X6X8545.15X7/8+6.1-0.606251.3/7 49/9-4/38/9 15/36+1/2712X5/6-2/938>5/4+1/46與/8-3/864/7 579+3/7 5/95/2-(3/2+4/5)47.6.547.6.5X(4.8-1.24)=0.68￥.9+0.32M.948.10.15-10.75 0.4-5.749.5.84(3.87-0.13)+4.2X3.7450.32.52-(6+9.728+3.2)X2.551.[(7.1-5.6)>0.9-1.15] 2552.5.4程.6X(3.7-2.9)+0.62]53.12X6+(12-7.2)-6(4)12X6^7.2-6102X4.57.8>6.9+2.2>6.95.6>0.258X(20—1.25)1)127+352+73+44 (2)89+276+135+33(1)25+71+75+29+88 (2)243+89+111+579405-2940+28X21920-1680+40+7690+47X52-398148+3328+64-75360X24+32+7302100-94+48X5451+(2304-2042)X234215+(4361-716)與1(247+18)X27+2536-720+(360+18)1080+(63-54)X80(528+912)>5-61788528+41X38-904264+318-8280+69(174+209)X26-9000814-(278+322)勺51406+735X9F53168-7828+38+504796-5040+(630+7)285+(3000-372)361+5/6-19/123x(-9)+7x(-9(-54)x1/6x(-1/3)1.18.1+(3-0.299R.23)X12.(6.8-6.80.55)€.57/8+ (1/8+1/9)9)5/6+5/63/4 879-1/37)5/49+3/146X1/2+2/3)TOC\o"1-5"\h\z8)4/5+8 8/531 )5/6-5/69/7- (2/7-10/21)5/9 18-14>2/74/5 25/16+2/3 3/414)8/7—5/6￥2/1517/32-3/4 )9/243)2/9+1/35/7 3725+3/73/14 2/3+1/61/5 273+5/6TOC\o"1-5"\h\z9/22+1/11 1/25/3 11/5+4/345)2/3+1/3 157/19+12/19 5761/4+3/4 2/38/7 21/16+1/2101M/5-1/5)2150+160+40(58+370)+(64-45)32.120-144+18+3533.347+45X2-4160芍234(58+37)+(64-9X5)35.95+(64-45)36.178-145與X6+42420+580-64X21+2837.812-700+(9+31X11) (136+64)X(65-345+23)38.85+14X(14+208+26)39.(284+16)X(512-8208+18)40.120-36>4勺8+3541.(58+37)+(64-9>5)42.(6.8-6.80.55)8543.0.12X4.80.12M.844.(3.2M.5+2.5)勺.6(2)3.2X(1.5+2.5)勺.645.6-1.64=5.38+7.85-5.37=46.7.2￡.8-1.25=6-1.193-0.43=3.0.12X4.80.12>4.84.(3.2M.5+2.5)+1.6(2)3.2X(1.5+2.5)勺.65.6-1.64=5.38+7.85-5.37=6.7.26.8-1.25=6-1.19&0.43=7.6.5X(4.8-1.24)=0.68M.9+0.32X1.9=8.10.15-10.750.4-5.7=9.5.8X(3.87-0.13)+4.2X3.74=10.32.52-(6+9.728—2)X2.5=11.[(7.1-5.6)X0.9-1.15] 25=12.5.4程.6X(3.7-2.9)+0.62]=13.12X6+(12-7.2)-6=14.12X6+7.2-6=15.33.02—(148.4—90.85)25=(一)1.3.375+5.75+2.25+6.6257291001—9036+183.8/25+14.5.50減去12.5的差，除以2.5商是多少？.某數(shù)的6倍與4的和等于19.25,求某數(shù)。(方程解)(二)15.36-32.14C3+5.7>2.1102>45-3282.8/1+17.6W19.2減去8.5與4.3的和，差是多少？一個(gè)數(shù)的30%比18少6,求這個(gè)數(shù)。(方程解)(三)1.6110M7+6392.3.5N7—52.2T84.3.3750.97+0.97>6.625.5減去2與1的積，在除以5,商是多少？.某數(shù)的比70多10,求某數(shù)？(方程解)(四)1.6.54+2.4+3.46+0.695.6K8+95.6>8.2600—420+127.344與.6—5.4>0.25（215.6田6X（0.25+0.125）］158減去80的差除以13,商是多少？7.5減去一個(gè)數(shù)的，差是6,求這個(gè)數(shù)。（方程解）（五）1.3001-19985000—105X340.150725+0.75M.2（）X0.24309除以41.25與5.75的和，商是多少？一個(gè)數(shù)的加上1.2等于10,求這個(gè)數(shù)。（方程解）（六）（25+）%300—4263+210.810725+5.962.6—1+（）X5個(gè)除以與的和，商是多少？一個(gè)數(shù)的比它的多4.5,求這個(gè)數(shù)。（方程解）（七）126.6+21.8340343X271.54.2—0.754.2554的減去3除以0.5得商，差是多少？一個(gè)數(shù)的65%與的和是1.5求這個(gè)數(shù)。（方程解）（八）143.274+3.27>5.7（1.2+）X4.5+1025—768+320.2580—0.45田.9比47大13的數(shù)乘以5減去4.25的差，積是多少？一個(gè)數(shù)的3倍減去4.5的差是1.5,求這個(gè)數(shù)。（方程解）（九）1.0.252.69M2.4.125X3.2348+275X165.2.4+2.4X5.375—3.375）7.比一個(gè)數(shù)的少2.4的數(shù)是1.8,求這個(gè)數(shù)。（方程解）8.4.5減去1.5乘以2.5的積，差是多少？（十）1.645—45X120.15+1.20.24-0.453.75—（2.35+0.254.25）76X+23X25%+0.2510-2.87-7.130.96+9.69.9從7.5里減去5.7的，差是多少？一個(gè)數(shù)的40%減去9.6等于6.4,求這個(gè)數(shù)。（方程解）（十一）12.37-3.25-6.7516E.8+2.2>16+16401￥9+28458.7-16.65與.70.44.7>2.5+（2.3+5.3）3.6除以2.5的商加上12.1的和是多少？一個(gè)數(shù)的0.4比0.9多0.5,求這個(gè)數(shù)。（方程解）3x-8=3x-8=161.9.31-1.125-7.8752.()X183.640+128X458.2K6—0.336F.2(400乘以0.62與0.08的和，積是多少？一個(gè)數(shù)的2.5倍等于37與8的和，求這個(gè)數(shù)。(方程解)1)3X-(1/2+1/4)=7/123X=7/12+3/43X=4/3X=4/96.6-5X=3/4-4X6.6-0.75=-4X+5XX=5.851.1X+2.2=5.5-3.3XX+3.3X=5.5-2.24.4X=3.3X=3/4=4/3還有(0.5+x)+x=9.822(X+X+0.5)=9.825000+x=6x3200=450+5X+XX-0.8X=612x-8x=4.87.5*2X=15x=81.6x+5.6=9.452-x=1591-x=1.3X+8.3=10.77(x-2)=2x+33x+9=2718(x-2)=27012x=300-4x7x+5.3=7.43x7(x-2)=2x+33x+9=2718(x-2)=27012x=300-4x7x+5.3=7.43x芍=4.830r+25=851.4>8-2x=66x-12.8>3=0.06410-3x=1703(x+0.5)=210.5x+8=436x-3x=181.5x+18=3x5X3-xe=80.273r=0.351.8x=0.972x田.756=909x-40=5x4+9=2148-27+5x=3110.5+x+21=56x+2x+18=78(200-x)5=30(x-140)70=40.1(x+6)=3.30.44(x-5.6)=1.67(6.5+x)=87.5(27.5-3.5)x=4x+19.8=25.85.6x=33.69.8-x=3.875.6殳=12.65x+12.5=32.35(x+8)=102x+3x+10=703(x+3)=50-x+35x+15=603.5-5x=20.3X7+4x=12.5x-1.5-1.25=0.754x-1.3>6=2.620-9x=1.2>6.256x+12.8=15.8150X2+3x=6902x-20=43x+6=182(2.8+x)=10.4(x-3)2=7.513.2x+9x=33.33x=x+100x+4.8=7.26x+18=483(x+2.1)=10.512x-9x=8.713(x+5)=1692x-97=34.23.4x-48=26.842x+25x=1341.5(x+1.6)=3.62(x-3)=5.865x+7=429x+4X2.5=914.2x+2.5x=13410.5x+6.5x=5189x-43x=9.25x-45=1001.2x-0.5x=6.323.4=2x=564x-x=48.64.5x-x=28X-5.7=2.15155X-2X=183X+0.7=53.5>2=4.2+x26X1.5=2x+100.5X16—16X0.2=4x139.25-X=0.40316.9宗=0.3X-0.5=2.6x+13=333