1、30 / 3030 / 3030 / 3030数学简便运算-小学数学简便运算专项练习238题(有答案)1.(0.86+0.86+0.86+0.86)25 2. 41+63. 125(508)4. 7.61.91.9(1.91.9)59999992999+161.250.250.0564 7. 20.0665+3802.0062.006308. (4)9. 2310. 3815.38+61.253.6211. 17.98+2.50.3181.512. +13.(+)14. 15. 16. 17. 18. 22.71.250.819. 3.912.8+6.092.820. 23.41623.462
2、1. 205.7514.2522. 1.250.253223. 56(+)240.279258+0.74227925. 1328+1127+1528+382726. (+)241527. 3.7+5.30.75+28. 9.9+99.9+999.929. 6.841.225%+40.2530. 6.3+6.44+2.7+3.56 31. 15.35(5.35+7.2)32. 60012 33. 6710234. 35. 36. 37. 38. 1.33.79+9.76.2139. 3.644+4.360.2540. ()()41. 94.25+442. ()4943. 1+2+3+4+49+5
3、044.4.80.2545. 2.330.5446. 1.22.5+0.82.547. 3.71.25848. 43.6+9.8+6.4 49. 17.30.258 50. 2.311.5+1.57.6951. 10.246.671.3352. 32000125853. 7.31+15.05+2.69+4.9554. 471015557329856. 194+50157. 627(427+189)58. 6301459. 125253260. 21065611253262. 6405863. 6539864. 944+102652579466. 81662567. 50254368. 8(25
4、15)69. (25072)470. 52513402071. 73502572. 5410173. 227+364+146+17374. 5604(723+1604)75. 1.67+0.33 76. 999667+66777. 200478. 81(3.811.65)+2.25 79. 24(+)80. (+)2481. +82. 2.53.21.25 83. 4.05(2.05+)84. 5.39+4.61+85.0.588+49.412+0.588864598+45287. 452(152+240)88. 9927 89. 1120167 90. 11336133691. 179245
5、+321155921.24+14.95+8.764.95 93. 52.75.272.7 94. 3520195. 4500254 96. 12532 97. 65499+3469998. 5612.599. 14.6(4.6+7.2)100. 9999+1991010.1250.2584102. 1927528472103. (+)105 104. +25%+0.25 105. 2+33+1+1 106. 3.799+3.7107.1.22.5+2.82.5108. 4.82.5109. 4.052.860.14110. 7+0.47111. 2.253.144+3.14112. ()171
6、5113. 6.38.7+8.73.7114. (+)12115. +116. 7.253+3.756 117. 49(+)25118. +119. +120. 12.580.4 121. 12122. 250.321.25123. 0.3779+3.72.1124. 20112011+125. +126. ()12127. 1000+999999128. 178.445.354.7129. 456(256144)130. 10245131. 3212525132. 4399+43133. (40+8)25134. 7399135. 541154136. 30179 137. 125724 1
7、38. 72879十27279139. 8.59+2.57+3.43+5.47 140. 49.62+27.1719.62 141. 1546(546239)142. 1431999+999999144. 4.376.3+4.373.7145. 2.641.250.8146. 10.20.45147. 3.5%9.9 148. 1+3+5+7+9149. 2008200620082007150. 24.870.531.47 151. 50152. 0.375153. 7.5+2.7+2.7+2.5+4.3 154. 7.93.270.73+1.1 155. 72125156. (80+4)12
8、5 157. 6788+6711+67 158. 20315159 43922997 160. 2.5321.25161. +162. 13+163. 9(20.759.5)0.4164. 165. 1.25322.5 166. 43.5+4.87480%167.(51.8)(1.15+)1168. 3333224+6666368169. 395283+154+246117 170. 87954998+299430022008171. 1999+999999 172. 38256173. 2.06101 174. 0.251250.32175. 1.258.8 176. 31.82.5+31.
9、87.5177. 198125 178. 38+129+71 179. 1756398180. 406201 181. 16125 182. 1900425183. 8.35+3.82.35184. 15.4(5.4+2.3)185. 9845186. 1612525187. 1269692188. (20+8)25189. 9+99+999+9999+99999;190. 12+34+56+1992+1993191. 3611; 192. 24611193. 678+(354+322)194. 283+147+17+1653195. 384(37+184)196. 2904132717319
10、7. 653197198. 12517125199. 23599200. (1300520)13201. 6721+1821+8579202. 222222999999203 18+2204. 205. 0.87.36320.08206. 65.54.29+24.65.71207. 1991+1989+2000+1995+2011+2005+1998+1993208. 9999922222+3333333334209. 200320042004200420032004210. 2.8(+)211. 101212. 9.8110%+0.598.1+0.049981213. 23+14 214.
11、38.418715.4384+3.316=215. 3(0.16+1)1.84216. 20092009217. 9+99+999+9999218. 4.0312.5219. 1997+1998+1999+2001 220. 342518821225221. 567999+5672 222.( 914875 )( 251316)223. 3+5+10224. 9997+1117225. 97226. (+)2002227. 8.5+0.755+6.51228. +229. 1.251.2532230. 15(+)17231. 2599+25232. 7575+7525233. 64125234
12、. 17+64+83+36235. 120012872236. 30001258237.658.7+6.50.230.65238. 答案:1(0.86+0.86+0.86+0.86)25,=0.86(425),=0.86100,=86;2. 41+6,=(4+6),=10,=6;3. 125(508),=125850,=100050,=20;4. 7.61.91.9(1.91.9),=7.61.91.90,=7.61.9,=7.6,=259999992999+1,=(10001)(9992)+1,=(10001)997+1,=10009971997+1,=997000997+1,=996004
13、61.250.250.0564,=1.250.250.05(842),=(1.258)(0.254)(0.052),=1010.1,=1;7. 20.0665+3802.0062.00630,=20.0665+(38030)2.006,=20.0665+3502.006,=20.0665+(35010)(2.00610),=20.0665+3520.06,=20.06(65+35),=20.06100,=20068. (4),=(),=()2,=2,=;9. 23,=(241),=24,=23,=;10. 3815.38+61.253.62,=38.75+61.25(15.38+3.62),=
14、10019,=81;11. 17.98+2.50.3181.5,=17.98+0.7512,=18.7312,=6.73;12. +,=(),=1,=;13.(+)=,=2+1,=314. ,=4.76+5.24+5,=10+5,=15,15. ,=30.1611.84,=(31)(0.16+1.84),=22,=0;16. ,=2.80.43+(+1),=2.80.43+2,=2.82.43,=0.37;17. ,=9.56(3+2),=9.566,=3.5618. 22.71.250.8,=22.7(1.250.8),=22.71,=22.7;19. 3.912.8+6.092.8,=(3
15、.91+6.09)2.8,=102.8,=2820. 23.41623.46,=(166)23.4,=1023.4,=234;21. 205.7514.25,=20(5.75+14.25),=2020,=;22. 1.250.2532,=1.250.2584,=1.258(0.254),=101,=10;23. 56(+),=5656+56,=2421+2,=524. 0.279258+0.742279,=2790.258+0.742289,=279(0.258+0.742),=2791,=279;25. 1328+1127+1528+3827,=,=()+(),=1+,=226. (+)24
16、15,=,=150+24,=174;27. 3.7+5.30.75+=(3.7+5.3+1)0.75,=100.75,=7.5;28. 9.9+99.9+999.9,=(9.9+0.1)+(99.9+0.1)+(999.9+0.1)0.13,=10+100+10000.3,=11100.3,=1109.7;29. 6.841.225%+40.25=6.81.2+4.4,=(6.81.2+4.4),=10,=2.530. 6.3+6.44+2.7+3.56,=(6.3+2.7)+(6.44+3.56),=9+10,=19;31. 15.35(5.35+7.2),=15.355.357.2,=10
17、7.2,=2.8;32. 60012,=600(62),=60062,=1002,=50;33. 67102,=67(100+2),=67100+672,=6700+134,=683434. ,=4.85+5.15(),=101,=9;35. ,=(4.753.6+6.153.6),=(4.75+6.151)3.6,=9.93.6,=3.96;36. ,=,=,=,=;37. =(1+3+5+7+9)+()+(),=25+()+(),=25+,=25+(),=25+,=25+(),=25=38. 1.33.79+9.76.21,=(1.3+9.7)(3.79+6.21),=1110,=1;39
18、. 3.644+4.360.25,=3.64+4.36,=(3.64+4.36),=8,=2;40. ()(),=,=,=;41. 94.25+4,=94+4,=(9+)4,=10,=;42. ()49,=()(49),=()36,=3636,=43,=1;43. 1+2+3+4+49+50,=(1+50)+(2+49)+(3+48)+(25+26),=51+51+51+51+51,=5125,=127544. 4.80.25,=1.2(40.25),=1.21,=1.2;45. 2.330.54,=2.33(0.54),=2.332,=4.66;46. 1.22.5+0.82.5,=(1.2
19、+0.8)2.5,=22.5,=5;47. 3.71.258=3.7(1.258),=3.710,=0.3748. 43.6+9.8+6.4,=9.8+(43.6+6.4),=9.8+50,=59.8;49. 17.30.258,=17.3(0.258),=17.32,=34.6;50. 2.311.5+1.57.69=(2.31+7.69)1.5,=101.5,=1551. 10.246.671.33,=10.24(6.67+1.33),=10.248,=2.24;52. 320001258,=32000(1258),=320001000,=32;53. 7.31+15.05+2.69+4.
20、95,=(7.31+2.69)+(15.05+4.95),=10+20,=30;54. 47101,=47+(100+1),=47100+47,=4700+47,=474755. 573298,=573300+2,=275;56. 194+501,=194+500+1,=695;57. 627(427+189),=627427189,=11;58. 63014,=63072,=902,=45;59. 1252532,=(1258)(254),=1000100,=100000;60. 21065,=210(65),=21030,=761. 12532,=12584,=10004,=4000;62
21、. 64058,=640(58),=64040,=16;63. 65398,=653100+2,=453+2,=455;64. 944+102,=944+100+2,=1044+2,=10466525794=25479=10079=790066. 816625=825166=200166=3320067. 502543=(254)(503)=100150=1500068. 8(2515)=82515=20015=300069. (25072)4=250472=100072=7200070. 525134020=(2540)(520)13=100010013=130000071. 735025,
22、=(73504)(254),=29400100,=294;72. 54101,=54100+54,=5454;73. 227+364+146+173,=(227+173)+(364+146),=400+510,=910;74. 5604(723+1604),=56041604723,=327775. 1.67+0.33,=(1.67+0.33),=2,=;76. 999667+6671,=667(999+1),=6671000,=66700077. 2004,=(2003+1),=2003+1,=2002+,=2002;78. 81(3.811.65)+2.25,=813.81+1.65+2.
23、25,=(813.81)+(1.65+2.25),=77.19+3.9,=81.09;79. 24(+),=2424+24,=206+16,=14+16,=3080. (+)24,=24+24,=16+6,=22;81. +,=+,=(+),=,=82. 2.53.21.25,=(2.50.4)(81.25),=110,=10;83. 4.05(2.05+),=4.052.05,=2,=1;84. 5.39+4.61+,=(5.39+4.61)+(1+),=10+2,=12;85. 0.588+49.412+0.588,=0.588(1+2)+49.412,=0.5884+49.412,=4(
24、0.588+9.412),=410,=4086. 4598+452,=45(98+2),=45100,=4500;87. 452(152+240),=452152240,=60;88. 9927,=(1001)27,=270027,=2673;89. 1120167,=1120(167),=1120112,=1090. 113361336,=36(11313),=36100,=3600;91. 179245+321155,=(179+321)(245+155),=400400,=092. 1.24+14.95+8.764.95,=(1.24+8.76)+(14.954.95),=10+10,=
25、20;93. 52.75.272.7,=(52.72.7)5.27,=50(5+0.27),=5050.27,=450.27,=44.73;94. 35201,=35(200+1),=35200+35,=7000+35,=7035;95. 4500254,=4500(254),=4500100,=45;96. 12532,=(1258)4,=10004,=4000;97. 65499+34699,=(654+346)99,=100099,=9900098. 5612.5,=7(812.5),=7100,=700;99. 14.6(4.6+7.2),=14.64.67.2,=107.2,=2.8
26、;100. 9999+199,=9999+99+100,=99(99+1)+100,=99100+100,=9900+100,=10000101. 0.1250.2584,=(0.1258)(0.254),=11,=1;102. 1927528472,=1927(528+472),=19271000,=927103. (+)105,=105+105+105,=35+21+7,=56+7,=63;104. +25%+0.25,=+,=(+),=,=;105. 2+33+1+1,=(2+13)+(1+3),=(43)+5,=+5,=5;106. 3.799+3.7,=3.7(99+1),=3.71
27、00,=370107. 1.22.5+2.82.5,=(1.2+2.8)2.5,=42.5,=10;108. 4.82.5,=(41.2)2.5,=(42.5)1.2,=101.2,=12109. 4.052.860.14,=4.05(2.86+0.14),=4.053,=1.05;110. +0.4,=(0.6+0.4),=1,=;111. 2.253.144+3.14,=2.2543.14+3.14,=93.14+3.14,=(9+1)3.14,=103.14,=31.4;112. ()1715,=15171715,=175,=121136.38.7+8.73.7 =(6.3+3.7)8.
28、7=108.7=87; 114. (+)12 =1212+12=42+3=5;115. +=+=( +)=2=1116. 7.253+3.756,=(7.25+3.75)(3+6),=119,=2117. 49(+)25,=4925,=595;118. ,=+,=(),=,=119. +,=,=1,=;120. 12.580.4,=()(12.50.4),=25,=10;121. 12,=(24)12,=(94)12,=512,=60122. 250.321.25,=250.40.81.25,=(250.4)(0.81.25),=101,=10;123. 0.3779+3.72.1,=3.77
29、.9+3.72.1,=3.7(7.9+2.1),=3.710,=37;124. 20112011+,=2011+,=2011+,=2001,=+,=1;125. +,=1+,=1,=;126. ()12,=1212,=76,=1;127. 1000+999999,=1000+999(10001),=1000+99910009991,=1000+999000999,=1000000999,=999001128. 178.445.354.7,=178.4(45.3+54.7),=178.4100,=78.4;129. 456(256144),=456256144,=200144,=56;130.
30、10245,=10045+245,=4500+90,=4590;131. 3212525,=(8125)(425),=1000100,=100000;132. 4399+43,=(99+1)43,=10043,=4300;133. (40+8)25,=4025+825,=1000+200,=1200;134. 7399,=73100731,=730073,=7227;135. 541154,=(111)54,=1054,=540136. 30179,=(300+1)79,=30079+179,=23700+79,=23779;137. 125724,=(1254)72,=50072,=3600
31、0;138. 72879十27279,=79(728+272),=791000,=79000;139. 8.59+2.57+3.43+5.47,=8.59+(2.57+3.43)+5.47,=8.59+6+5.47,=20.06;140. 49.62+27.1719.62,=49.6219.62+27.17,=30+27.17,=57.17;141. 1546(546239),=1546546+239,=1000+239,=1239142+,=(+),=(+),=,=1431999+999999,=(10001)999+1999,=999000999+1999,=999000+1000,=10
32、00000144. 4.376.3+4.373.7,=4.37(6.3+3.7),=4.3710,=43.7;145. 2.641.250.8,=2.64(1.250.8),=2.641,=2.64;146. 10.20.45,=(10+2)0.45,=100.45+20.45,=4.5+0.9,=5.4147. 3.5%9.9,=0.035(100.1),=0.035100.0350.1,=0.350.0035,=0.3465;148. 1+3+5+7+9,=1+3+5+7+9+,=(1+3+5+7+9)+(+),=25+(1+),=25+(1),=25+,=25;149. 20082006
33、20082007,=2008(200710000+2007+1)2006(200810000+2007),=2008200710000+20072008+2008200620081000020062007,=200810000+22007+2008,=20080000+4014+2008,=20086022150. 24.870.531.47,=24.87(0.53+1.47),=24.872,=22.87;151. 50,=50,=15+2012,=3512,=23;152. 0.375,=+,=(+1),=8,=3153. 7.5+2.7+2.7+2.5+4.3 =(7.5+2.5)+(2
34、.7+4.3)+2.7,=10+7+2.7,=19.7;154. 7.93.270.73+1.1=7.9+1.1(3.27+0.73),=94,=5;155. 72125=98125,=9(8125),=91000,=9000;156. (80+4)125 =80125+4125,=10000+500,=10500;157. 6788+6711+67 =(88+11+1)67,=10067,=6700158. 20315=(200+3)15,=20015+315,=3000+45,=3045159. 43922997,=43923000+3,=1392+3,=1395;160. 2.5321.25,=(2.54)(81.25),=1010,=100;161. +,=(),=1,=;162. 13+,=(13+1),=14,=6;163. 9(20.759.5)0.4,=911.250.4,=9(10+1.25)0.4,=9100.4+1.250.4,=94+0.5,=94.5,=2;164. ,=,=(1),=,=0.3165. 1.25322.5,