1、人教版四年级数学下册第三单元 简便运算 专项训练人教版四年级数学下册第三单元 简便运算 专项训练一、计算题(共33题;共395分)1直接写出得数。 342716= 185545= 25134=(84)5= 196116= 36643636=2脱式计算,标*的题要用运算律简算 (1)28 (2)*25739643 (3)*136254 (4)*78102-782 3用简便方法计算。 (1)347-(24775) (2)48-25-75152 (3)5713843 4脱式计算,能简算的要简算。 36643636 1254825 (927-583)437512999 88125 155计算下面各题,
2、能简算的要简算。 (1)230 (2)340-2402021 (3)321725125 (4)13668-6836 6下面各题怎样简便就怎样算。 (1)307-98 (2)1453916155 (3)54030140 (4)275-40016 7用自己喜欢的方法计算。 (1)10236 (2)38346817132 (3)165 (4)98360(30-26) 8简便计算。 (1)8(12523) (2)14352-5243 (3)202136 9用递等式计算,能简算的就简算。 (1)559-32(28040) (2)57154315 (3)125-39-61 (4)864 10下面各题,用你
3、喜欢的方法计算,要写出计算过程(一步计算可用竖式计算)。 94416 15899 6271258 1237812322 (4310457)1711用递等式计算。 (1)672 (2)12598 (3)1694516954169 12用简便方法计算。 (1)862125 (2)10236 (3)10599-599 (4)348-69-31 13怎样简便就怎样计算。 (1)24735165-47 (2)72287272 (3)460(80-72021) 14用你喜欢的方法计算,能简算的要简算。 10183 97-12643 67536747125238 549954 54015怎样简便就怎样计算。
4、 (1)2547-253 (2)48181454 16怎样简便就怎样计算。 35239-152 50284 604-135-653600518 991515 10445-45417怎样简便就怎样计算。 64357136 264-(3864) 407-107-5585-39105 245-6535 366-43-573418用你认为最简便的方法计算。 45142 36156415 1251812021245 55104 7540619用简便方法计算:10999 2021简便就怎样计算。 (1)652139248 (2)462355465 21怎样简便就怎样计算。 12532 4425 36012
5、5800254 4500153 3501822用加法交换律或加法结合律计算。 (1)1125938 (2)734565 (3)3055825 (4)(25963)137 23用乘法分配律计算。 (2511)4 15(86) (125-9)618353235 5644444424能简便的用简便方法计算。 (1)254 (2)38456245 (3)23101 (4)655 (186 -155) 25选择合适的方法计算。 (1)282021 (2)12532 (3)44889 (4)49035 26用简便方法计算。 (1)2574 (2)132181832 (3)54045 27简便计算。 (1)
6、230016535 (2)125728 (3)4510145 28用简便方法计算,并写出简便过程。 330001258 57985721252532 93101-93 268-73-2729脱式计算,怎样简便就怎样计算。 (1) (2)1723-237 (3)3225 (4)32 30用简便方法计算。 (1)12691749 (2)() (3)1253225 31用简便方法计算,请写清楚简算步骤。 28528611415 ()39565661 741258 3510132用简便方法计算下面各题。 7223828 12548 1016737464663 938-263-53733怎样算简便就怎样
7、算。 548302 2544 33052715512945 57396157 64101-64答案解析部分一、计算题1【答案】 342716=77 185545=118 25134=1300 (84)5=60 196116=180 36643636=3600 2【答案】 (1)28 =828 =224(2)25739643 =25743396 =300396 =696(3)136254 =136(254) =136100 =13600(4)78102-782 =78(102-2) =78100 =7800 3【答案】 (1)347-(24775) =347-247-75=100-75=25(2
8、)48-25-75152 =48152-25-75=(48152)-(2575)=2021100=100(3)5713843 =5743138=100138=2384【答案】 36643636 =36(6436) =36100 =3600 1254825 =(1258)(425) =1000100 =100000 (927-583)4375 =3444375 =875 =600 12999 =12(1000-1) =121000-12 =12021-12 =11988 88125 =(808)125 =801258125 =100001000 =11000 15 =15(67221) =153
9、2 =480 5【答案】 (1)230 =2307 =1610(2)340-2402021 =340-125 =340-60 =280(3)321725125 =17(425)(8125) =171001000 =1700000(4)13668-6836 =(136-36)68 =10068 =6800 6【答案】 (1)307-98 =307-(100-2)=307-1002=2021(2)1453916155 =(14555)(39161)=202100=400(3)54030140 =18140=252021(4)275-40016 =275-25=2507【答案】 (1)10236 =
10、(1002)36 =10036236 =360072 =3672(2)38346817132 =(38317)(468132) =400600 =1000(3)165 =16515 =11(4)98360(30-26) =983604 =9890 =188 8【答案】 (1)8(12523) =812523 =100023 =23000(2)14352-5243 =52(143-43) =52100 =52021(3)202136 =(2021)36 =202136236 =720212 =7272 9【答案】 (1)559-32(28040) =559-327 =559-224 =335(2
11、)57154315 =(5743)15 =10015 =1500(3)125-39-61 =125-(3961) =125-100 =25(4)864 =86436 =24 10【答案】 94416=59 15899 =158(100-1) =158100158 =15800158 =15642 6 =(196-100)6 =966 =16 271258 =125827 =100027 =27000 1237812322 =123(7822) =123100 12300 (4310457)17 =(4357104)17 202117 12 11【答案】 (1)672 =672(143) =67
12、242 =16(2)12598 =(1258)9 =10009 =9000(3)1694516954169 =169(45541) =169100 =16900 12【答案】 (1)862125 =812562 =100062 =62021(2)10236 =10036236 =360072 =3672(3)10599-599 =(105-5)99 =10099 =9900(4)348-69-31 =348-(6931) =348-100 =248 13【答案】 (1)24735165-47 =(247-47)(35165) =202100 =400(2)72287272 =72(2872)
13、=72100 =72021(3)460(80-72021) =460(80-80) =4600 =0 14【答案】 10183 =(1001)83 =8310083 =830083 =8383 97-12643 =97-7243 =543 =48 67536747 =67(5347) =67100 =6700 125238 =125823 =100023 =23000 549954 =54(991) =54100 =5400 540 =540(312) =54036 =15 15【答案】 (1)2547-253 =25(47-3) =2544 =25(404) =2540254 =100010
14、0 =1100(2)48181454 =481814318 =48184218 =(4842)18 =9018 =162021 16【答案】 35239-152 =352-15239 =20219 =239 50284 =50428 =202128 =5600604-135-65 =604-(13565) =604-2021 =4043600518 =3600(518) =360090 =40991515 =9915151 =15(991) =15100 =150010445-454 =(104-4)45 =10045 =450017【答案】 64357136 =64136357 =20215
15、7 =557 264-(3864) =264-64-38 =202138 =162 407-107-55 =300-55 =245 85-39105 =85105-39 =190-39 =151 245-6535 =24535-65 =280-65 =215 366-43-5734 =36634-(4357) =400-100 =300 18【答案】 45142 =45214 =9014 =1260 36156415 =(3664)15 =10015 =1500 12518 =125(108) =125101258 =12501000 =2250 12021245 =12021(245) =1
16、202112021=10 55104 =55(1004) =55100554 =550022021=57202175406 =30006 =18000 19【答案】 10999 =109(100-1) =109100-1091 =10900-109 =10791。 2021案】 (1)652139248 =652248139 =900139 =1039(2)462355465 =(4654)(23565) =100300 =400 21【答案】 解:12532 =12584 =10004 =4000 4425 =11(425) =11100 =1100 360125 =360(125) =36
17、060 =6 800254 =800(254) =800100 =8 4500153 =4500(153) =450045 =100 35018 =35029 =7009 =6300 22【答案】 (1)1125938 =1123859 =15059 =219(2)734565 =73(4564) =73110 =183(3)3055825 =3052558 =33058 =388(4)(25963)137 =259(63137) =2592021 =459 23【答案】 (2511)4 =254114 =10044 =144 15(86) =158156 =12021 =210 (125-9
18、)6 =1256-96 =150-56 =94 18353235 =(1832)35 =5035 =1750 56444444 =(5644)44 =10044 =4400 24【答案】 (1)254 = 254 =100 =320212)38456245 =(3862)45 =10045 =4500(3)23101 =23(1001) =23100231 =230023 =2323(4)655 (186 -155) =655-155186 =500186 =686 25【答案】 (1)282021 =28(2021) =28202183 =560084 =5684(2)12532 =1258
19、4 =10004 =4000(3)44889=53 (4)49035 =490(75) =49075 =705 =14 26【答案】 (1)2574 2547 1007 700(2)132181832 (13232)18 10018 1800(3)54045 54095 605 12 27【答案】 (1)230016535 =2300-(16535) =2300-2021 =2100(2)125728 =125872 =100072 =72021(3)4510145 =45(101-1) =45100 =4500 28【答案】 =()() =1010 =2021 330001258 =3300
20、0(1258) =330001000 =33; 5798572 =57(982) =57100 =5700; 1252532 =1252584 =(1258)(254) =1000100 =100000; 93101-93 =93(101-1) =93100 =9300; 268-73-27 =268-(7327) =268-100 =168。 29【答案】 (1) =()() =58 =13(2)1723-237 =(17-7)23 =1023 =230(3)3225 =8425 =8(425) =8100 =800(4)32 =325 =160 30【答案】 (1)12691749 =(1
21、26174)9 =3009 =2700(2)() = = =(3)1253225 =1258425 =(1258)(425) =1000100 =100000 31【答案】 28528611415 =(28515)(286114) =300400 =700 () =() = =105 39565661 =(3961)56 =10056 =5600 741258 =74(1258) =741000 =74000 =()() =210 =12 35101 =35(1001) =3510035 =3535 32【答案】 7223828 =238(7228) =238100 =338 12548 =(
22、1258)6 =10006 =6000 10167 =(1001)67 =1006767 =670067 =6767 37464663 =(3763)46 =10046 =4600 938-263-537 =938-(263537) =938-800 =138 33【答案】 548302 =5483002 =8482 =850; 2544 =25(404) =2540254 =1000100 =1100; 33052 =330(52) =33010 =33; 715512945 =(71129)(5545) =202100 =300; 57396157 =57(3961) =57100 =5700; 64101-64 =64(101-1) =64100 =6400。
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