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06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初

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06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初
06.小学总复习简便运算238题(30页)_小学数学口算竖式脱式计算应用题一二三四五六年级上下册电_小学数学口算题库电子版(1-6)_笔算题(1-小升初)_笔算题小升初

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小学数学简便运算专项练习 238 题(有答案) 9. ×23 1.(0.86+0.86+0.86+0.86)×25 2. 4÷1 +6× 10. 38 ﹣15.38+61.25﹣3.62 3. 125÷(50÷8) 11. 17.98+2.5×0.3﹣18÷1.5 4. 7.6× ÷[1.9﹣1.9×(1.9﹣1.9)]. 12. × + × 5.999×999﹣2×999+1. 13.( + )÷ . 6.1.25×0.25×0.05×64 14. 7. 20.06×65+380×2.006﹣2.006×30. 8. ( ﹣ ÷4× )÷ 15. 124.0.279×258+0.742×279 16. 25. 13÷28+11÷27+15÷28+38÷27. 26. ( + )×24×15 17. . 18. 22.7×1.25×0.8 27. 3.7× +5.3×0.75+ . 19. 3.91×2.8+6.09×2.8. 28. 9.9+99.9+999.9 20. 23.4×16﹣23.4×6 29. 6.8÷4﹣1.2×25%+4 ×0.25. 21. 20 ﹣5.75﹣14.25 30. 6.3+6.44+2.7+3.56 22. 1.25×0.25×32 31. 15.35﹣(5.35+7.2) 32. 600÷12 23. 56×( ﹣ + ) 数学简便运算------ 2÷( ﹣ )×( ﹣ ) 40. 33. 67×102. 34. 41. 9 ×4.25+4 × 42. ( ﹣ )×4×9 35. 43. 1+2+3+4+…+49+50. 36. 44.4.8×0.25 37. . 45. 2.33×0.5×4 38. 1.3﹣3.79+9.7﹣6.21 46. 1.2×2.5+0.8×2.5 39. 3.64÷4+4.36×0.25 47. 3.7÷1.25÷8. 数学简便运算------ 348. 43.6+9.8+6.4 58. 630÷14 49. 17.3×0.25×8 59. 125×25×32 50. 2.31×1.5+1.5×7.69. 60. 210÷6÷5. 51. 10.24﹣6.67﹣1.33 61.125×32 52. 32000÷125÷8 62. 640÷5÷8 53. 7.31+15.05+2.69+4.95 63. 653﹣98 54. 47×101 64. 944+102. 55.573﹣298 65.25×79×4 56. 194+501 66. 8×166×25 57. 627﹣(427+189) 数学简便运算------ 467. 50×25×4×3 77. 2004× 68. 8×(25×15) 78. 81﹣(3.81﹣1.65)+2.25 69. (250×72)×4 79. 24×( ﹣ + ). 70. 5×25×13×40×20. 71. 7350÷25 80. ( + )×24 72. 54×101 81. + × 73. 227+364+146+173 82. 2.5×3.2×1.25 74. 5604﹣(723+1604) 83. 4.05﹣(2.05+ ) ×1.67+0.33× 75. 84. 5.39+ +4.61+ 76. 999×667+667. 数学简便运算------ 585.0.588× +4×9.412+ ×0.588. 95. 4500÷25÷4 86.45×98+45×2 96. 125×32 87. 452﹣(152+240) 97. 654××99+346×99. 88. 99×27 98. 56×12.5 89. 1120÷16÷7 99. 14.6﹣(4.6+7.2) 90. 113×36﹣13×36 100. 99×99+199. 91. 179﹣245+321﹣155. 101.0.125×0.25×8×4 92.1.24+14.95+8.76﹣4.95 102. 1927﹣528﹣472. 93. 52.7﹣5.27﹣2.7 103. ( + + )×105 94. 35×201 数学简便运算------ 6104. × +25%× +0.25× 112. ( ﹣ )×17×15. 113. 6.3×8.7+8.7×3.7 2 +3 ﹣3 +1 +1 105. 114. ( ﹣ + )×12 106. 3.7×99+3.7 115. × + ÷ . 107.1.2×2.5+2.8×2.5 116. 7.25﹣3+3.75﹣6 108. 4.8×2.5. 117. 49×( + )×25 109. 4.05﹣2.86﹣0.14 × + ÷ ﹣ . 118. 110. 7 × +0.4×7 111. 2.25×3.14×4+3.14 119. ﹣ + 数学简便运算------ 7128. 178.4﹣45.3﹣54.7 120. ×12.5×8×0.4 129. 456﹣(256﹣144) 121. ×12. 130. 102×45 122. 25×0.32×1.25 131. 32×125×25 123. 0.37×79+3.7×2.1 132. 43×99+43 124. 2011÷2011 + 133. (40+8)×25 125. + ++ + 134. 73×99 126. ( ﹣ )×12 135. 54×11﹣54. 127. 1000+999×999. 136. 301×79 数学简便运算------ 8137. 125×72×4 147. 3.5%×9.9 138. 728×79十272×79 148. 1 +3 +5 +7 +9 139. 8.59+2.57+3.43+5.47 149. 2008×20072008﹣2006×20082007. 140. 49.62+27.17﹣19.62 150. 24.87﹣0.53﹣1.47 141. 1546﹣(546﹣239) 151. 50× 142. . 152. 0.375× . 143.1999+999×999. 153. 7.5+2.7+2.7+2.5+4.3 144. 4.37×6.3+4.37×3.7 154. 7.9﹣3.27﹣0.73+1.1 145. 2.64÷1.25÷0.8 155. 72×125 146. 10.2×0.45. 数学简便运算------ 9156. (80+4)×125 165. 1.25×32×2.5 157. 67×88+67×11+67 166. 4 ×3.5+4.8×7 ﹣480% 158. 203×15. 167.(5 ﹣1.8)÷[(1.15+ )×1 ] 159. 4392﹣2997 168. 3333×224+6666×368. 160. 2.5×32×1.25 169. 395﹣283+154+246﹣117 161. × + ÷ 170. 8795﹣4998+2994﹣3002﹣2008 171. 1999+999×999 162. 13× + 172. 38×25×6. 163. 9÷[(20.75﹣9.5)]×0.4] 173. 2.06×101 164. ÷ ﹣ × . 数学简便运算------ 10174. 0.25×125×0.32 184. 15.4﹣(5.4+2.3) 175. 1.25×8.8 185. 98×45 176. 31.8×2.5+31.8×7.5. 186. 16×125×25 177. 19×8×125 187. 12×69﹣69×2 178. 38+129+71 188. (20+8)×25. 179. 1756﹣398 189. 9+99+999+9999+99999; 180. 406×201 190. 1﹣2+3﹣4+5﹣6+…﹣1992+1993. 181. 16×125 191. 36×11; 182. 1900÷4÷25. 192. 246×11. 183. 8.35+3.8﹣2.35 193. 678+(354+322) 数学简便运算------ 11203. 18 × +2 194. 283+147+17+1653 195. 384﹣(37+184) × ﹣ . 204. 196. 2904﹣1327﹣173 205. 0.8×7.3﹣63×20.08 197. 653﹣197 206. 65.5﹣4.29+24.6﹣5.71 198. 125×17﹣125 207. 1991+1989+2000+1995+2011+2005+1998+1993. 199. 235×99 208. 99999×22222+33333×33334 200. (1300﹣520)÷13 209. 2003×2004÷2004×2004﹣2003×2004 201. 67×21+18×21+85×79 210. 2.8×( + ) 202. 222222×999999. 数学简便运算------ 12211. 101× 220. 3425﹣188﹣212﹣25 212. 9.81×10%+0.5×98.1+0.049×981 221. 567×999+567×2 222.( 91×48×75 )÷( 25×13×16) 213. 23× +14× . 223. ×3+ ×5+ ×10 214. 38.4×187﹣15.4×384+3.3×16= 224. 999×7+111×7 215. 3 ﹣(0.16+1 )﹣1.84 225. 97× 216. 2009÷2009 226. ( + + + )×2002 217. 9 +99 +999 +9999 ﹣ 227. 8.5× +0.75×5+6.5÷1 218. 4.03÷12.5. 219. 1997+1998+1999+2001 数学简便运算------ 13+ + + + . 237..65×8.7+6.5×0.23﹣0.65 228. . 238. 229. 1.25×1.25×32 230. 15×( + )×17. 231. 25×99+25 232. 75×75+75×25 233. 64×125 234. 17+64+83+36 235. 1200﹣128﹣72 236. 3000÷125÷8. 数学简便运算------ 146.1.25×0.25×0.05×64, =1.25×0.25×0.05×(8×4×2), =(1.25×8)×(0.25×4)×(0.05×2), =10×1×0.1, =1; 7. 20.06×65+380×2.006﹣2.006×30, =20.06×65+(380﹣30)×2.006, =20.06×65+350×2.006, =20.06×65+(350÷10)×(2.006×10), =20.06×65+35×20.06, =20.06×(65+35), =20.06×100, =2006 8. ( ﹣ ÷4× )÷ , =( )÷ , 答案: =( )×2, 1.(0.86+0.86+0.86+0.86)×25, = 2, =0.86×(4×25), =0.86×100, ; = =86; 2. 4÷1 +6× , 9. ×23, =(4+6)× , = (24﹣1), =10× , = 24 , =6; =23 , 3. 125÷(50÷8), =125×8÷50, = ; =1000÷50, =20; 10. 38 ﹣15.38+61.25﹣3.62, 4. 7.6× ÷[1.9﹣1.9×(1.9﹣1.9)], =38.75+61.25﹣(15.38+3.62), =100﹣19, =7.6× ÷[1.9﹣1.9×0], =81; 11. 17.98+2.5×0.3﹣18÷1.5, =7.6× ÷1.9, =17.98+0.75﹣12, =18.73﹣12, =7.6× , =6.73; =2 12. × + × , 5.999×999﹣2×999+1, =(1000﹣1)×(999﹣2)+1, =( )× , =(1000﹣1)×997+1, =1000×997﹣1×997+1, =1× , =997000﹣997+1, =996004 数学简便运算------ 15= ; 21. 20 ﹣5.75﹣14.25, 13.( + )÷ . =20 ﹣(5.75+14.25), = , =20 ﹣20, =2+1, = ; =3 22. 1.25×0.25×32, 14. , =1.25×0.25×8×4, =1.25×8×(0.25×4), =4.76+5.24+5 , =10×1, =10; =10+5 , 23. 56×( ﹣ + ), =15 , =56× ﹣56× +56× , 15. , =24﹣21+2, =5 =3 ﹣0.16﹣1 ﹣1.84, 24. 0.279×258+0.742×279, =279×0.258+0.742×289, =(3 ﹣1 )﹣(0.16+1.84), =279×(0.258+0.742), =2﹣2, =279×1, =0; =279; 25. 13÷28+11÷27+15÷28+38÷27, 16. , = , =2.8﹣[0.43+( +1 )], =( )+( ), =2.8﹣[0.43+2], =2.8﹣2.43, =1+ , =0.37; 17. , =2 =9.56﹣(3 +2 ), 26. ( + )×24×15, =9.56﹣6, = , =3.56 18. 22.7×1.25×0.8, =150+24, =22.7×(1.25×0.8), =174; =22.7×1, 27. 3.7× +5.3×0.75+ . =22.7; 19. 3.91×2.8+6.09×2.8, =(3.7+5.3+1)×0.75, =(3.91+6.09)×2.8, =10×0.75, =10×2.8, =7.5; =28 28. 9.9+99.9+999.9, 20. 23.4×16﹣23.4×6, =(9.9+0.1)+(99.9+0.1)+(999.9+0.1)﹣0.1×3, =(16﹣6)×23.4, =10+100+1000﹣0.3, =10×23.4, =1110﹣0.3, =234; =1109.7; 数学简便运算------ 1629. 6.8÷4﹣1.2×25%+4 ×0.25. = , =6.8× ﹣1.2× +4.4× , = ; =(6.8﹣1.2+4.4)× , 37. . =10× , =(1+3+5+7+9)+( )+( ) , =2.5 =25+( )+( ) , 30. 6.3+6.44+2.7+3.56, =(6.3+2.7)+(6.44+3.56), =25+ + , =9+10, =19; =25+( ) , 31. 15.35﹣(5.35+7.2), =15.35﹣5.35﹣7.2, =25+ , =10﹣7.2, =2.8; =25+( ), 32. 600÷12, =600÷(6×2), =25 =600÷6÷2, =100÷2, = . =50; 33. 67×102, 38. 1.3﹣3.79+9.7﹣6.21, =67×(100+2), =(1.3+9.7)﹣(3.79+6.21), =67×100+67×2, =11﹣10, =6700+134, =1; =6834 39. 3.64÷4+4.36×0.25, 34. , =3.64× +4.36× , =4.85+5.15﹣( ), =(3.64+4.36)× , =10﹣1, =8× , =9; =2; 35. , 40. ÷( ﹣ )×( ﹣ ), = (4.75× ﹣3.6+6.15×3.6), = ÷ × , = [(4.75+6.15﹣1)×3.6], = × , = 9.9×3.6, = ; =3.96; 36. , 41. 9 ×4.25+4 × , = [ ], =9 ×4 +4 × , = , =(9 + )×4 , 数学简便运算------ 17=10.24﹣(6.67+1.33), =10× , =10.24﹣8, =2.24; = ; 52. 32000÷125÷8, =32000÷(125×8), 42. ( ﹣ )×4×9, =32000÷1000, =32; =( ﹣ )×(4×9), 53. 7.31+15.05+2.69+4.95, =(7.31+2.69)+(15.05+4.95), =( ﹣ )×36, =10+20, =30; = ×36﹣ ×36, 54. 47×101, =4﹣3, =47+(100+1), =1; =47×100+47, =4700+47, 43. 1+2+3+4+…+49+50, =4747 =(1+50)+(2+49)+(3+48)+…+(25+26), 55. 573﹣298, =51+51+51+51+…+51, =573﹣300+2, =51×25, =275; =1275 56. 194+501, 44. 4.8×0.25, =194+500+1, =1.2×(4×0.25), =695; =1.2×1, 57. 627﹣(427+189), =1.2; =627﹣427﹣189, 45. 2.33×0.5×4, =11; =2.33×(0.5×4), 58. 630÷14, =2.33×2, =630÷7÷2, =4.66; =90÷2, 46. 1.2×2.5+0.8×2.5, =45; =(1.2+0.8)×2.5, 59. 125×25×32, =2×2.5, =(125×8)×(25×4), =5; =1000×100, 47. 3.7÷1.25÷8. =100000; =3.7÷(1.25×8), 60. 210÷6÷5, =3.7÷10, =210÷(6×5), =0.37 =210÷30, 48. 43.6+9.8+6.4, =7 =9.8+(43.6+6.4), 61. 125×32, =9.8+50, =125×8×4, =59.8; =1000×4, 49. 17.3×0.25×8, =4000; =17.3×(0.25×8), 62. 640÷5÷8, =17.3×2, =640÷(5×8), =34.6; =640÷40, 50. 2.31×1.5+1.5×7.69. =16; =(2.31+7.69)×1.5, 63. 653﹣98, =10×1.5, =653﹣100+2, =15 =453+2, 51. 10.24﹣6.67﹣1.33, =455; 数学简便运算------ 1864. 944+102, = ; =944+100+2, =1044+2, 76. 999×667+667×1, =1046 =667×(999+1), 65.25×79×4 =667×1000, =25×4×79 =667000 =100×79 77. 2004× , =7900 66. 8×166×25 =(2003+1)× , =8×25×166 =200×166 =2003× +1× , =33200 67. 50×25×4×3 =2002+ , =(25×4)×(50×3) =100×150 =2002 ; =15000 68. 8×(25×15) 78. 81﹣(3.81﹣1.65)+2.25, =8×25×15 =81﹣3.81+1.65+2.25, =200×15 =(81﹣3.81)+(1.65+2.25), =3000 =77.19+3.9, 69. (250×72)×4 =81.09; =250×4×72 79. 24×( ﹣ + ), =1000×72 =72000 =24× ﹣24× +24× , 70. 5×25×13×40×20 =(25×40)×(5×20)×13 =20﹣6+16, =1000×100×13 =14+16, =1300000 =30 71. 7350÷25, 80. ( + )×24, =(7350×4)÷(25×4), =29400÷100, = ×24+ ×24, =294; 72. 54×101, =16+6, =54×100+54, =22; =5454; 81. + × , 73. 227+364+146+173, =(227+173)+(364+146), = × + × , =400+510, =910; =( + )× , 74. 5604﹣(723+1604), = × , =5604﹣1604﹣723, =3277 = ×1.67+0.33× , 75. 82. 2.5×3.2×1.25, =(2.5×0.4)×(8×1.25), = ×(1.67+0.33), =1×10, =10; = ×2, 数学简便运算------ 1993. 52.7﹣5.27﹣2.7, 83. 4.05﹣(2.05+ ), =(52.7﹣2.7)﹣5.27, =50﹣(5+0.27), =4.05﹣2.05﹣ , =50﹣5﹣0.27, =45﹣0.27, =2﹣ , =44.73; 94. 35×201, =1 ; =35×(200+1), =35×200+35, 84. 5.39+ +4.61+ , =7000+35, =7035; =(5.39+4.61)+(1 + ), 95. 4500÷25÷4, =10+2, =4500÷(25×4), =12; =4500÷100, =45; 85. 0.588× +4×9.412+ ×0.588, 96. 125×32, =(125×8)×4, =0.588×(1 +2 )+4×9.412, =1000×4, =0.588×4+4×9.412, =4000; =4×(0.588+9.412), 97. 654×99+346×99, =4×10, =(654+346)×99, =40 =1000×99, 86. 45×98+45×2, =99000 =45×(98+2), 98. 56×12.5, =45×100, =7×(8×12.5), =4500; =7×100, 87. 452﹣(152+240), =700; =452﹣152﹣240, 99. 14.6﹣(4.6+7.2), =60; =14.6﹣4.6﹣7.2, 88. 99×27, =10﹣7.2, =(100﹣1)×27, =2.8; =2700﹣27, 100. 99×99+199, =2673; =99×99+99+100, 89. 1120÷16÷7, =99×(99+1)+100, =1120÷(16×7), =99×100+100, =1120÷112, =9900+100, =10 =10000 90. 113×36﹣13×36, 101. 0.125×0.25×8×4, =36×(113﹣13), =(0.125×8)×(0.25×4), =36×100, =1×1, =3600; =1; 91. 179﹣245+321﹣155, 102. 1927﹣528﹣472, =(179+321)﹣(245+155), =1927﹣(528+472), =400﹣400, =1927﹣1000, =0 =927 92. 1.24+14.95+8.76﹣4.95, 103. ( + + )×105, =(1.24+8.76)+(14.95﹣4.95), =10+10, = ×105+ ×105+ ×105, =20; 数学简便运算------ 20=35+21+7, =2.25×4×3.14+3.14, =56+7, =9×3.14+3.14, =63; =(9+1)×3.14, =10×3.14, 104. × +25%× +0.25× , =31.4; = × + × + × , 112. ( ﹣ )×17×15, =( + + )× , = ×15×17﹣ 17×15, =17﹣5, = × , =12 = ; 113.6.3×8.7+8.7×3.7 =(6.3+3.7)×8.7 105. 2 +3 ﹣3 +1 +1 , =10×8.7 =87; =(2 +1 ﹣3 )+(1 +3 ), 114. ( ﹣ + )×12 =(4﹣3 )+5, = ×12﹣ ×12+ ×12 = +5, =4﹣2+3 =5; =5 ; 115. × + ÷ . 106. 3.7×99+3.7, =3.7×(99+1), = × + × =3.7×100, =370 =( + )× 107. 1.2×2.5+2.8×2.5, =(1.2+2.8)×2.5, =2× =4×2.5, =10; =1 108. 4.8×2.5, =(4×1.2)×2.5, 116. 7.25﹣3+3.75﹣6, =(4×2.5)×1.2, =(7.25+3.75)﹣(3+6), =10×1.2, =11﹣9, =12 =2. 109. 4.05﹣2.86﹣0.14, 117. 49×( + )×25, =4.05﹣(2.86+0.14), =4.05﹣3, =49× ×25, =1.05; =595; 110. +0.4× , 118. , = (0.6+0.4), = × + × ﹣ , = ×1, =( )× , = ; = × , 111. 2.25×3.14×4+3.14, 数学简便运算------ 21= =1﹣ , 119. ﹣ + , = ; = , 126. ( ﹣ )×12, =1 , = ×12﹣ ×12, =7﹣6, = ; =1; 127. 1000+999×999, 120. ×12.5×8×0.4, =1000+999×(1000﹣1), =1000+999×1000﹣999×1, =( )×(12.5×0.4), =1000+999000﹣999, =2×5, =1000000﹣999, =10; =999001 128. 178.4﹣45.3﹣54.7, 121. ×12, =178.4﹣(45.3+54.7), =178.4﹣100, =(24× )×12, =78.4; =(9﹣4)×12, 129. 456﹣(256﹣144), =5×12, =456﹣256﹣144, =60 =200﹣144, 122. 25×0.32×1.25, =56; =25×0.4×0.8×1.25, 130. 102×45, =(25×0.4)×(0.8×1.25), =100×45+2×45, =10×1, =4500+90, =10; =4590; 123. 0.37×79+3.7×2.1, 131. 32×125×25, =3.7×7.9+3.7×2.1, =(8×125)×(4×25), =3.7×(7.9+2.1), =1000×100, =3.7×10, =100000; =37; 132. 43×99+43, =(99+1)×43, 124. 2011÷2011 + , =100×43, =4300; =2011÷ + , 133. (40+8)×25, =40×25+8×25, =2011× + , =1000+200, =1200; =2001× , 134. 73×99, =73×100﹣73×1, = + , =7300﹣73, =1; =7227; 135. 54×11﹣54, 125. + + + + , =(11﹣1)×54, =10×54, =1﹣ + ﹣ + ﹣ + ﹣ + ﹣ , =540 136. 301×79, 数学简便运算------ 22=(300+1)×79, =4.5+0.9, =300×79+1×79, =5.4. =23700+79, 147. 3.5%×9.9, =23779; =0.035×(10﹣0.1), 137. 125×72×4, =0.035×10﹣0.035×0.1, =(125×4)×72, =0.35﹣0.0035, =500×72, =0.3465; =36000; 148. 1 +3 +5 +7 +9 , 138. 728×79十272×79, =79×(728+272), =1+ +3+ +5+ +7+ +9+ , =79×1000, =79000; =(1+3+5+7+9)+( + + + + ), 139. 8.59+2.57+3.43+5.47, =8.59+(2.57+3.43)+5.47, =25+(1﹣ + ﹣ + ﹣ + ﹣ + ﹣ ), =8.59+6+5.47, =20.06; =25+(1﹣ ), 140. 49.62+27.17﹣19.62, =49.62﹣19.62+27.17, =25+ , =30+27.17, =57.17; =25 ; 141. 1546﹣(546﹣239), =1546﹣546+239, 149. 2008×20072008﹣2006×20082007, =1000+239, =2008×(2007×10000+2007+1)﹣2006× =1239 (2008×10000+2007), =2008×2007×10000+2007×2008+2008﹣ 142. × + × + × + × , 2006×2008×10000﹣2006×2007, =2008×10000+2×2007+2008, =( + + + )× , =20080000+4014+2008, =20086022 =( + + + )× , 150. 24.87﹣0.53﹣1.47, =24.87﹣(0.53+1.47), = × , =24.87﹣2, =22.87; = 151. 50× , 143.1999+999×999, =(1000﹣1)×999+1999, =50× , =999000﹣999+1999, =999000+1000,=1000000 =15+20﹣12, 144. 4.37×6.3+4.37×3.7, =35﹣12, =4.37×(6.3+3.7), =23; =4.37×10, 152. 0.375× , =43.7; 145. 2.64÷1.25÷0.8, = × + ﹣ , =2.64÷(1.25×0.8), =2.64÷1, =( +1﹣ )× , =2.64; 146. 10.2×0.45, =8× , =(10+2)×0.45, =10×0.45+2×0.45, =3 数学简便运算------ 23153. 7.5+2.7+2.7+2.5+4.3 163. 9÷[(20.75﹣9.5)]×0.4], =(7.5+2.5)+(2.7+4.3)+2.7, =9÷[11.25×0.4], =10+7+2.7, =9÷[(10+1.25)×0.4], =19.7; =9÷[10×0.4+1.25×0.4], 154. 7.9﹣3.27﹣0.73+1.1 =9÷[4+0.5], =7.9+1.1﹣(3.27+0.73), =9÷4.5, =9﹣4, =2; =5; 164. ÷ ﹣ × , 155. 72×125 =9×8×125, = ﹣ × , =9×(8×125), =9×1000, = ×(1﹣ ), =9000; 156. (80+4)×125 = × , =80×125+4×125, =10000+500, =0.3 =10500; 165. 1.25×32×2.5, 157. 67×88+67×11+67 =(1.25×8)×(4×2.5), =(88+11+1)×67, =10×10, =100×67, =100; =6700. 166. 4 ×3.5+4.8×7 ﹣480%, 158. 203×15 =(200+3)×15, =4.8×3.5+4.8×7.5﹣4.8×1, =200×15+3×15, =4.8×(3.5+7.5﹣1), =3000+45, =4.8×10, =3045 =48; 159. 4392﹣2997, 167. (5 ﹣1.8)÷[(1.15+ )×1 ], =4392﹣3000+3, =1392+3, =(5 ﹣1 )÷[(1 + )× ], =1395; 160. 2.5×32×1.25, = ÷[ × ], =(2.5×4)×(8×1.25), =10×10, = ÷3, =100; 161. × + ÷ , = ; 168. 3333×224+6666×368, =( )× , =3333×224+3333×2×368, =3333×(224+736), =1× , =3333×960, =3199680 = ; 169. 395﹣283+154+246﹣117 =395+(154+246)﹣(283+117) 162. 13× + , =395+400﹣400 =395; =(13+1)× , 171. 8795﹣4998+2994﹣3002﹣2008 =8795+2994﹣(4998+3002)﹣2008 =14× , =11789﹣8000﹣2008 =6; =1781; 数学简便运算------ 24171. 1999+999×999 =2000; =1999+999×(1000﹣1) 182. 1900÷4÷25, =1999+999000﹣999 =1900÷(4×25), =1000+999000 =1900÷100, =1000000; =19 172. 38×25×6 183. 8.35+3.8﹣2.35, =38×(25×6) =8.35﹣2.35+3.8, =38×150 =6+3.8, =5700 =9.8; 173. 2.06×101 184. 15.4﹣(5.4+2.3), =2.06×(100+1) =15.4﹣5.4﹣2.3, =2.06×100+2.06×1 =10﹣2.3, =206+2.06 =7.7; =208.06; 185. 98×45, 174. 0.25×125×0.32 =(100﹣2)×45, =0.25×125×0.4×0.8 =100×45﹣2×45, =(0.25×0.4)×(125×0.8) =4500﹣90, =0.1×100 =4410; =10; 186. 16×125×25, 175. 1.25×8.8 =(8×125)×(2×25), =1.25×(8+0.8) =1000×50, =1.25×8+1.25×0.8 =50000; =10+1 187. 12×69﹣69×2, =11; =(12﹣2)×69, 176. 31.8×2.5+31.8×7.5 =10×69, =31.8×(2.5+7.5) =690; =31.8×10 188. (20+8)×25, =318 =20×25+8×25, 177. 119×8×125, =500+200, =119×(8×125), =700 =119×1000, 189. 9+99+999+9999+99999 =119000; =(10﹣1)+(100﹣1)+(1000﹣1)+(10000﹣1)+(100000 178. 38+129+71, ﹣1) =38+(129+71), =10+100+1000+10000+100000﹣5 =38+200, =111110﹣5 =238; =111105; 179. 1756﹣398, 190. 1﹣2+3﹣4+5﹣6++1991﹣1992+1993 =1756﹣400+2, =1+(3﹣2)+(5﹣4)+(7﹣6)++(1991﹣1990)+(1993﹣ =1356+2, 1992) =1358; =1+1×996 180. 406×201, =997 =406×(200+1), 191. 36×11 =406×200+406×1, =36×(10+1) =81200+406, =36×10+36×1 =81606; =360+36 181. 16×125, =396; =2×8×125, 192. 246×11 =2×(8×125), =246×(10+1) =2×1000, =246×10+246×1 数学简便运算------ 25=2460+246 203. 18 × +2, =2706 193. 678+354+322 = × +2, =678+322+354 =1000+354 =17.67+2, =1354; =19.67; 194. 283+147+17+1653 204. × ﹣ , =283+17+(147+1653) =300+1800 = ﹣ , =2100; 195. 384﹣(37+184) = ﹣ , =384﹣(184+37) =384﹣184﹣37 =﹣ ; =200﹣37 =163; 205. 0.8×7.3﹣63×20.08 196. 2904﹣1327﹣173 =5.84﹣1265.04, =2904﹣(1327+173) =﹣1259.2; =2904﹣1500 206. 65.5﹣4.29+24.6﹣5.71, =1404; =(65.5+24.6)﹣(4.29+5.71), 197. 653﹣197 =90.1﹣10, =653﹣200+3 =80.1; =453+3 207. 1991+1995+2000+1989+2011+2005+1998+1993, =456; =(2000﹣9)+(2000﹣5)+2000+(2000﹣ 198. 125×17﹣125 11)+(2000+11)+(2000+5)+(2000﹣2)+(2000﹣7), =125×(17﹣1) =2000×8﹣9﹣5﹣11+11+5﹣2﹣7, =125×16 =16000﹣18, =125×8×2 =15982 =1000×2 208. 99999×22222+33333×33334, =2000; =33333×3×22222+33333×33334, 199. 235×99 =33333×(66666+33334) =235×(100﹣1) =33333×100000, =235×100﹣235×1 =3333300000; =23500﹣235 209. 2003×2004÷2004×2004﹣2003×2004, =23265; =2003×2004﹣2003×2004, 200. (1300﹣520)÷13 =0; =1300÷13﹣520÷13 210. 2.8×( + ), =100﹣40 =60; =2.8× +2.8× , 201. 67×21+18×21+85×79 =21×(67+18)+85×79 =0.4+0.3, =21×85+85×79 =0.7; =85×(21+79) 211. 101× , =85×100 =8500; =(102﹣1)× , 202. 222222×999999 =222222×(1000000﹣1) =102× ﹣1× , =222222×1000000﹣222222×1 =222222000000﹣222222 =99﹣ , =222221777778 数学简便运算------ 26=98 ; =[(9+99+999+9999)+( )]﹣ , 212. 9.81×10%+0.5×98.1+0.049×981, =[10+100+1000+10000﹣4+ ]﹣ , =9.81×0.1+5×9.81+4.9×9.81, =9.81×(0.1+5+4.9), =11110﹣4, =9.81×10, =11106; =98.1; 218. 4.03÷12.5, =(4.03×8)÷(12.5×8), 213. 23× +14× , =32.24÷100, =0.3224 =23× +16× , 219. 1997+1998+1999+2001 =(2000﹣3)+(2000﹣2)+(2000﹣1)+(2000+1) =(23+16)× , =2000×4﹣5 =7995; =39× , 220. 3425﹣188﹣212﹣25 =14 =3425﹣(188+212)﹣25 214. 38.4×187﹣15.4×384+3.3×16 =3425﹣400﹣25 =38.4×(187﹣154)+3.3×16 =3000; =38.4×33+3.3×16 221. 567×999+567×2 =3.3×(384+16) =567×(999+2) =3.3×400 =567×(1000+1) =1320 =567×1000+567 =567000+567 215. 3 ﹣(0.16+1 )﹣1.84, =567567; 222. (91×48×75)÷(25×13×16) =3 ﹣0.16﹣1 ﹣1.84, =(63×25×13×16)÷(25×13×16) =63×(25×13×16)÷(25×13×16) =3 ﹣1 ﹣(0.16+1.84), =63 =2﹣2, 223.. ×3+ ×5+ ×10, =0; 216. 2009÷2009 , = ×(3+5+10), =2009 , = ×18, =5; =2009 , 224. 999×7+111×7, =7×(999+111), =2009× , =7×1110, =7770, = ; 225. 97× , 或1÷(2009 ÷2009), =(96+1)× , =1÷1 , =96× +1× , = . =5+ , 217. 9 +99 +999 +9999 ﹣ , =5 ; 数学简便运算------ 27=200; 226. ( + + + )×2002, 235. 1200﹣128﹣72, =1200﹣(128+72), = ×2002+ ×2002+ ×2002+ ×2002; =1200﹣200, =1001+286+182+154, =1000; =1623; 236. 3000÷125÷8, =3000÷(125×8), 227. 8.5× +0.75×5+6.5÷1 , =3000÷1000, =3 =8.5× + ×5+6.5× , 237. 65×8.7+6.5×0.23﹣0.65 =565.5+1.495﹣0.65, = ×(8.5+5+6.5), =566.995﹣0.65, =566.345; = ×20, 238. , =15; + + + + , =1 … , 228. = + + + + + + + + + ﹣1, =1﹣ , =1+10+100+1000+10000﹣1, = =11110 229.1.25×1.25×32, =(1.25×8)×(1.25×4), =10×5, =50; 230. 15×( + )×17, =( + )×17×15, = ×17×15+ ×17×15, =17+15, =32 231. 25×99+25, =25×(99+1), =25×100, =2500; 232. 75×75+75×25, =75×(75+25), =75×100, =7500; 233. 64×125, =8×8×125, =8×(8×125), =8×1000, =8000; 234. 17+64+83+36, =(17+83)+(64+36), =100+100, 数学简便运算------ 28