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小升初总复习简便运算238题(30页)

试卷简介

这套小学数学试卷主要聚焦于简便运算的专项练习,包含238道题目。这些题目涵盖了多种计算方法和技巧,如加减法、乘除法等,旨在提高学生的计算速度与准确性。试题的设计覆盖了不同难度级别,既有基础的计算题也有需要运用一定技巧的复杂计算题,适合学生进行自我检测和巩固所学知识。

所涉及的知识点

这套试卷的主要知识点是通过各种形式的练习题来训练和巩固学生的简便运算能力,包括但不限于加法、减法、乘法和除法的基本运算,以及通过观察数字特征、分解因数、利用分配律等技巧来进行快速准确的计算。

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. 4÷1+6×

3. 125÷(50÷8)

4. 7.6×÷[1.9﹣1.9×(1.9﹣1.9)].

5.999×999﹣2×999+1.

6.1.25×0.25×0.05×64

7. 20.06×65+380×2.006﹣2.006×30.

8. (﹣÷4×)÷

9. ×23

10. 38﹣15.38+61.25﹣3.62

11. 17.98+2.5×0.3﹣18÷1.5

12. ×+×

13.(+)÷.

14.

15.

16.

18. 22.7×1.25×0.8

19. 3.91×2.8+6.09×2.8.

20. 23.4×16﹣23.4×6

21. 20﹣5.75﹣14.25

22. 1.25×0.25×32

23. 56×(﹣+)

24.0.279×258+0.742×279

25. 13÷28+11÷27+15÷28+38÷27.

26. (+)×24×15

27. 3.7×+5.3×0.75+.

28. 9.9+99.9+999.9

29. 6.8÷4﹣1.2×25%+4×0.25.

30. 6.3+6.44+2.7+3.56

31. 15.35﹣(5.35+7.2)

32. 600÷12

33. 67×102.

34.

35.

36.

37. .

38. 1.3﹣3.79+9.7﹣6.21

39. 3.64÷4+4.36×0.25

40. ÷(﹣)×(﹣)

41. 9×4.25+4×

42. (﹣)×4×9

43. 1+2+3+4+…+49+50.

44. 4.8×0.25

45. 2.33×0.5×4

46. 1.2×2.5+0.8×2.5

47. 3.7÷1.25÷8.

48. 43.6+9.8+6.4

49. 17.3×0.25×8

50. 2.31×1.5+1.5×7.69.

51. 10.24﹣6.67﹣1.33

52. 32000÷125÷8

53. 7.31+15.05+2.69+4.95

54. 47×101

55.573﹣298

56. 194+501

57. 627﹣(427+189)

58. 630÷14

59. 125×25×32

60. 210÷6÷5.

61.125×32

62. 640÷5÷8

63. 653﹣98

64. 944+102.

65.25×79×4

66. 8×166×25

67. 50×25×4×3

68. 8×(25×15)

69. (250×72)×4

70. 5×25×13×40×20.

71. 7350÷25

72. 54×101

73. 227+364+146+173

74. 5604﹣(723+1604)

75. ×1.67+0.33×

76. 999×667+667.

77. 2004×

78. 81﹣(3.81﹣1.65)+2.25

79. 24×(﹣+).

80. (+)×24

81. +× 

82. 2.5×3.2×1.25

83. 4.05﹣(2.05+)

84. 5.39++4.61+

85.0.588×+4×9.412+×0.588.

86.45×98+45×2

87. 452﹣(152+240)

88. 99×27

89. 1120÷16÷7

90. 113×36﹣13×36

91. 179﹣245+321﹣155.

92.1.24+14.95+8.76﹣4.95

93. 52.7﹣5.27﹣2.7

94. 35×201

95. 4500÷25÷4

96. 125×32

97. 654××99+346×99.

98. 56×12.5

99. 14.6﹣(4.6+7.2)

100. 99×99+199.

101.0.125×0.25×8×4      

102. 1927﹣528﹣472.

103. (++)×105

104. ×+25%×+0.25×

105. 2+3﹣3+1+1

106. 3.7×99+3.7

107. 1.2×2.5+2.8×2.5

108. 4.8×2.5.

109. 4.05﹣2.86﹣0.14

110. 7×+0.4×7

111. 2.25×3.14×4+3.14

112. (﹣)×17×15.

113. 6.3×8.7+8.7×3.7

(﹣+)×12

115. ×+÷.

116. 7.25﹣3+3.75﹣6

117. 49×(+)×25

118. ×+÷﹣.

119. ﹣+

120. ×12.5×8×0.4

121. ×12.

122. 25×0.32×1.25

123. 0.37×79+3.7×2.1

124. 2011÷2011+

125. ++++

126. (﹣)×12

127. 1000+999×999.

178.4﹣45.3﹣54.7

129. 456﹣(256﹣144)

130. 102×45

131. 32×125×25

132. 43×99+43

133. (40+8)×25

134. 73×99

135. 54×11﹣54.

136. 301×79

137. 125×72×4

138. 728×79十272×79

139. 8.59+2.57+3.43+5.47

140. 49.62+27.17﹣19.62

141. 1546﹣(546﹣239)

142. .

143.1999+999×999.

4.37×6.3+4.37×3.7

145. 2.64÷1.25÷0.8

146. 10.2×0.45.

147. 3.5%×9.9

148. 1+3+5+7+9

149. 2008×20072008﹣2006×20082007.

150. 24.87﹣0.53﹣1.47

151. 50×

152. 0.375×.

7.5+2.7+2.7+2.5+4.3

7.9﹣3.27﹣0.73+1.1

155. 72×125

(80+4)×125

67×88+67×11+67

158. 203×15.

159. 4392﹣2997

160. 2.5×32×1.25

161. ×+÷

162. 13×+

163. 9÷[(20.75﹣9.5)]×0.4]

164. ÷﹣×.

165. 1.25×32×2.5

166. 4×3.5+4.8×7﹣480%

167.(5﹣1.8)÷[(1.15+)×1]

168. 3333×224+6666×368.

169. 395﹣283+154+246﹣117

170. 8795﹣4998+2994﹣3002﹣2008

1999+999×999

172. 38×25×6.

173. 2.06×101

174. 0.25×125×0.32

175. 1.25×8.8

176. 31.8×2.5+31.8×7.5.

19×8×125

178. 38+129+71

179. 1756﹣398

180. 406×201

181. 16×125

182. 1900÷4÷25.

8.35+3.8﹣2.35

184. 15.4﹣(5.4+2.3)

185. 98×45

186. 16×125×25

187. 12×69﹣69×2

188. (20+8)×25.

189. 9+99+999+9999+99999;

190. 1﹣2+3﹣4+5﹣6+…﹣1992+1993.

36×11;

192. 246×11.

193. 678+(354+322)

194. 283+147+17+1653

195. 384﹣(37+184)

196. 2904﹣1327﹣173

197. 653﹣197

198. 125×17﹣125

199. 235×99

200. (1300﹣520)÷13

201. 67×21+18×21+85×79

202. 222222×999999.

203. 18×+2

204. ×﹣.

205. 0.8×7.3﹣63×20.08

206. 65.5﹣4.29+24.6﹣5.71

207. 1991+1989+2000+1995+2011+2005+1998+1993.

208. 99999×22222+33333×33334

209. 2003×2004÷2004×2004﹣2003×2004

210. 2.8×(+)

211. 101×

212. 9.81×10%+0.5×98.1+0.049×981

213. 23×+14×.

214. 38.4×187﹣15.4×384+3.3×16=

215. 3﹣(0.16+1)﹣1.84

216. 2009÷2009

217. 9+99+999+9999﹣

218. 4.03÷12.5.

219. 1997+1998+1999+2001

220. 3425﹣188﹣212﹣25

221. 567×999+567×2

222.( 91×48×75 )÷( 25×13×16)

×3+×5+×10

224. 999×7+111×7

225. 97×

226. (+++)×2002

227. 8.5×+0.75×5+6.5÷1

228. ++++.

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.

237..65×8.7+6.5×0.23﹣0.65

238. .

答案: 

1.(0.86+0.86+0.86+0.86)×25,

=0.86×(4×25),

=0.86×100,

=86;

2. 4÷1+6×,

=(4+6)×,

=10×,

=6;

3. 125÷(50÷8),

=125×8÷50,

=1000÷50,

=20;

4. 7.6×÷[1.9﹣1.9×(1.9﹣1.9)],

=7.6×÷[1.9﹣1.9×0],

=7.6×÷1.9,

=7.6×,

=2

5.999×999﹣2×999+1,

=(1000﹣1)×(999﹣2)+1,

=(1000﹣1)×997+1,

=1000×997﹣1×997+1,

=997000﹣997+1,

=996004

6.1.25×0.25×0.05×64,

=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×)÷,

=()÷,

=()×2,

=2,

=;

9. ×23,

=(24﹣1),

=24,

=23,

=;

10. 38﹣15.38+61.25﹣3.62,

=38.75+61.25﹣(15.38+3.62),

=100﹣19,

=81;

11. 17.98+2.5×0.3﹣18÷1.5,

=17.98+0.75﹣12,

=18.73﹣12,

=6.73;

12. ×+×,

=()×,

=1×,

=;

13.(+)÷.

=,

=2+1,

=3

14. ,

=4.76+5.24+5,

=10+5,

=15,

15. ,

=3﹣0.16﹣1﹣1.84,

=(3﹣1)﹣(0.16+1.84),

=2﹣2,

=0;

16. ,

=2.8﹣[0.43+(+1)],

=2.8﹣[0.43+2],

=2.8﹣2.43,

=0.37;

17. ,

=9.56﹣(3+2),

=9.56﹣6,

=3.56

18. 22.7×1.25×0.8,

=22.7×(1.25×0.8),

=22.7×1,

=22.7;

19. 3.91×2.8+6.09×2.8,

=(3.91+6.09)×2.8,

=10×2.8,

=28

20. 23.4×16﹣23.4×6,

=(16﹣6)×23.4,

=10×23.4,

=234;

21. 20﹣5.75﹣14.25,

=20﹣(5.75+14.25),

=20﹣20,

=;

22. 1.25×0.25×32,

=1.25×0.25×8×4,

=1.25×8×(0.25×4),

=10×1,

=10;

23. 56×(﹣+),

=56×﹣56×+56×,

=24﹣21+2,

=5

24. 0.279×258+0.742×279,

=279×0.258+0.742×289,

=279×(0.258+0.742),

=279×1,

=279;

25. 13÷28+11÷27+15÷28+38÷27,

=,

=()+(),

=1+,

=2

26. (+)×24×15,

=,

=150+24,

=174;

27. 3.7×+5.3×0.75+.

=(3.7+5.3+1)×0.75,

=10×0.75,

=7.5;

28. 9.9+99.9+999.9,

=(9.9+0.1)+(99.9+0.1)+(999.9+0.1)﹣0.1×3,

=10+100+1000﹣0.3,

=1110﹣0.3,

=1109.7;

29. 6.8÷4﹣1.2×25%+4×0.25.

=6.8×﹣1.2×+4.4×,

=(6.8﹣1.2+4.4)×,

=10×,

=2.5

30. 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),

=15.35﹣5.35﹣7.2,

=10﹣7.2,

=2.8;

32. 600÷12,

=600÷(6×2),

=600÷6÷2,

=100÷2,

=50;

33. 67×102,

=67×(100+2),

=67×100+67×2,

=6700+134,

=6834

34. ,

=4.85+5.15﹣(),

=10﹣1,

=9;

35. ,

=(4.75×﹣3.6+6.15×3.6),

=[(4.75+6.15﹣1)×3.6],

=9.9×3.6,

=3.96;

36. ,

=[],

=,

=,

=;

37. .

=(1+3+5+7+9)+()+(),

=25+()+(),

=25++,

=25+(),

=25+,

=25+(),

=25

=.

38. 1.3﹣3.79+9.7﹣6.21,

=(1.3+9.7)﹣(3.79+6.21),

=11﹣10,

=1;

39. 3.64÷4+4.36×0.25,

=3.64×+4.36×,

=(3.64+4.36)×,

=8×,

=2;

40. ÷(﹣)×(﹣),

=÷×,

=×,

=;

41. 9×4.25+4×,

=9×4+4×,

=(9+)×4,

=10×,

=;

42. (﹣)×4×9,

=(﹣)×(4×9),

=(﹣)×36,

=×36﹣×36,

=4﹣3,

=1;

43. 1+2+3+4+…+49+50,

=(1+50)+(2+49)+(3+48)+…+(25+26),

=51+51+51+51+…+51,

=51×25,

=1275

44. 4.8×0.25,

=1.2×(4×0.25),

=1.2×1,

=1.2;

45. 2.33×0.5×4,

=2.33×(0.5×4),

=2.33×2,

=4.66;

46. 1.2×2.5+0.8×2.5,

=(1.2+0.8)×2.5,

=2×2.5,

=5;

47. 3.7÷1.25÷8.

=3.7÷(1.25×8),

=3.7÷10,

=0.37

48. 43.6+9.8+6.4,

=9.8+(43.6+6.4),

=9.8+50,

=59.8;

49. 17.3×0.25×8,

=17.3×(0.25×8),

=17.3×2,

=34.6;

50. 2.31×1.5+1.5×7.69.

=(2.31+7.69)×1.5,

=10×1.5,

=15

51. 10.24﹣6.67﹣1.33,

=10.24﹣(6.67+1.33),

=10.24﹣8,

=2.24;

52. 32000÷125÷8,

=32000÷(125×8),

=32000÷1000,

=32;

53. 7.31+15.05+2.69+4.95,

=(7.31+2.69)+(15.05+4.95),

=10+20,

=30;

54. 47×101,

=47+(100+1),

=47×100+47,

=4700+47,

=4747

55. 573﹣298,

=573﹣300+2,

=275;

56. 194+501,

=194+500+1,

=695;

57. 627﹣(427+189),

=627﹣427﹣189,

=11;

58. 630÷14,

=630÷7÷2,

=90÷2,

=45;

59. 125×25×32,

=(125×8)×(25×4),

=1000×100,

=100000;

60. 210÷6÷5,

=210÷(6×5),

=210÷30,

=7

61. 125×32,

=125×8×4,

=1000×4,

=4000;

62. 640÷5÷8,

=640÷(5×8),

=640÷40,

=16;

63. 653﹣98,

=653﹣100+2,

=453+2,

=455;

64. 944+102,

=944+100+2,

=1044+2,

=1046

65.25×79×4

=25×4×79

=100×79

=7900

66. 8×166×25

=8×25×166

=200×166

=33200

67. 50×25×4×3

=(25×4)×(50×3)

=100×150

=15000

68. 8×(25×15)

=8×25×15

=200×15

=3000

69. (250×72)×4

=250×4×72

=1000×72

=72000

70. 5×25×13×40×20

=(25×40)×(5×20)×13

=1000×100×13

=1300000

71. 7350÷25,

=(7350×4)÷(25×4),

=29400÷100,

=294;

72. 54×101,

=54×100+54,

=5454;

73. 227+364+146+173,

=(227+173)+(364+146),

=400+510,

=910;

74. 5604﹣(723+1604),

=5604﹣1604﹣723,

=3277

75. ×1.67+0.33×,

=×(1.67+0.33),

=×2,

=;

76. 999×667+667×1,

=667×(999+1),

=667×1000,

=667000

77. 2004×,

=(2003+1)×,

=2003×+1×,

=2002+,

=2002;

78. 81﹣(3.81﹣1.65)+2.25,

=81﹣3.81+1.65+2.25,

=(81﹣3.81)+(1.65+2.25),

=77.19+3.9,

=81.09;

79. 24×(﹣+),

=24×﹣24×+24×,

=20﹣6+16,

=14+16,

=30 

80. (+)×24,

=×24+×24,

=16+6,

=22;

81. +×,

=×+×,

=(+)×,

=×,

=

82. 2.5×3.2×1.25,

=(2.5×0.4)×(8×1.25),

=1×10,

=10;

83. 4.05﹣(2.05+),

=4.05﹣2.05﹣,

=2﹣,

=1;

84. 5.39++4.61+,

=(5.39+4.61)+(1+),

=10+2,

=12;

85. 0.588×+4×9.412+×0.588,

=0.588×(1+2)+4×9.412,

=0.588×4+4×9.412,

=4×(0.588+9.412),

=4×10,

=40

86. 45×98+45×2,

=45×(98+2),

=45×100,

=4500;

87. 452﹣(152+240),

=452﹣152﹣240,

=60;

88. 99×27,

=(100﹣1)×27,

=2700﹣27,

=2673;

89. 1120÷16÷7,

=1120÷(16×7),

=1120÷112,

=10

90. 113×36﹣13×36,

=36×(113﹣13),

=36×100,

=3600;

91. 179﹣245+321﹣155,

=(179+321)﹣(245+155),

=400﹣400,

=0

92. 1.24+14.95+8.76﹣4.95,

=(1.24+8.76)+(14.95﹣4.95),

=10+10,

=20;

93. 52.7﹣5.27﹣2.7,

=(52.7﹣2.7)﹣5.27,

=50﹣(5+0.27),

=50﹣5﹣0.27,

=45﹣0.27,

=44.73;

94. 35×201,

=35×(200+1),

=35×200+35,

=7000+35,

=7035;

95. 4500÷25÷4,

=4500÷(25×4),

=4500÷100,

=45;

96. 125×32,

=(125×8)×4,

=1000×4,

=4000;

97. 654×99+346×99,

=(654+346)×99,

=1000×99,

=99000

98. 56×12.5,

=7×(8×12.5),

=7×100,

=700;

99. 14.6﹣(4.6+7.2),

=14.6﹣4.6﹣7.2,

=10﹣7.2,

=2.8;

100. 99×99+199,

=99×99+99+100,

=99×(99+1)+100,

=99×100+100,

=9900+100,

=10000

101. 0.125×0.25×8×4,

=(0.125×8)×(0.25×4),

=1×1,

=1;

102. 1927﹣528﹣472,

=1927﹣(528+472),

=1927﹣1000,

=927

103. (++)×105,

=×105+×105+×105,

=35+21+7,

=56+7,

=63;

104. ×+25%×+0.25×,

=×+×+×,

=(++)×,

=×,

=;

105. 2+3﹣3+1+1,

=(2+1﹣3)+(1+3),

=(4﹣3)+5,

=+5,

=5;

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,

=4×2.5,

=10;

108. 4.8×2.5,

=(4×1.2)×2.5,

=(4×2.5)×1.2,

=10×1.2,

=12

109. 4.05﹣2.86﹣0.14,

=4.05﹣(2.86+0.14),

=4.05﹣3,

=1.05;

110. +0.4×,

=(0.6+0.4),

=×1,

=;

111. 2.25×3.14×4+3.14,

=2.25×4×3.14+3.14,

=9×3.14+3.14,

=(9+1)×3.14,

=10×3.14,

=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

=10×8.7

=87;

114. (﹣+)×12

=×12﹣×12+×12

=4﹣2+3

=5;

115. ×+÷.

=×+×

=( +)×

=2×

=1 

116. 7.25﹣3+3.75﹣6,

=(7.25+3.75)﹣(3+6),

=11﹣9,

=2.

117. 49×(+)×25,

=49××25,

=595;

118. ,

=×+×﹣,

=()×,

=×,

= 

119. ﹣+,

=,

=1,

=;

120. ×12.5×8×0.4,

=()×(12.5×0.4),

=2×5,

=10;

121. ×12,

=(24×)×12,

=(9﹣4)×12,

=5×12,

=60

122. 25×0.32×1.25,

=25×0.4×0.8×1.25,

=(25×0.4)×(0.8×1.25),

=10×1,

=10;

123. 0.37×79+3.7×2.1,

=3.7×7.9+3.7×2.1,

=3.7×(7.9+2.1),

=3.7×10,

=37;

124. 2011÷2011+,

=2011÷+,

=2011×+,

=2001×,

=+,

=1;

125. ++++,

=1﹣+﹣+﹣+﹣+﹣,

=1﹣,

=;

126. (﹣)×12,

=×12﹣×12,

=7﹣6,

=1;

127. 1000+999×999,

=1000+999×(1000﹣1),

=1000+999×1000﹣999×1,

=1000+999000﹣999,

=1000000﹣999,

=999001

128. 178.4﹣45.3﹣54.7,

=178.4﹣(45.3+54.7),

=178.4﹣100,

=78.4;

129. 456﹣(256﹣144),

=456﹣256﹣144,

=200﹣144,

=56;

130. 102×45,

=100×45+2×45,

=4500+90,

=4590;

131. 32×125×25,

=(8×125)×(4×25),

=1000×100,

=100000;

132. 43×99+43,

=(99+1)×43,

=100×43,

=4300;

133. (40+8)×25,

=40×25+8×25,

=1000+200,

=1200;

134. 73×99,

=73×100﹣73×1,

=7300﹣73,

=7227;

135. 54×11﹣54,

=(11﹣1)×54,

=10×54,

=540

136. 301×79,

=(300+1)×79,

=300×79+1×79,

=23700+79,

=23779;

137. 125×72×4,

=(125×4)×72,

=500×72,

=36000;

138. 728×79十272×79,

=79×(728+272),

=79×1000,

=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+27.17﹣19.62,

=49.62﹣19.62+27.17,

=30+27.17,

=57.17;

141. 1546﹣(546﹣239),

=1546﹣546+239,

=1000+239,

=1239

142.×+×+×+×,

=(+++)×,

=(+++)×,

=×,

= 

143.1999+999×999,

=(1000﹣1)×999+1999,

=999000﹣999+1999,

=999000+1000,=1000000

144. 4.37×6.3+4.37×3.7,

=4.37×(6.3+3.7),

=4.37×10,

=43.7;

145. 2.64÷1.25÷0.8,

=2.64÷(1.25×0.8),

=2.64÷1,

=2.64;

146. 10.2×0.45,

=(10+2)×0.45,

=10×0.45+2×0.45,

=4.5+0.9,

=5.4.

147. 3.5%×9.9,

=0.035×(10﹣0.1),

=0.035×10﹣0.035×0.1,

=0.35﹣0.0035,

=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. 2008×20072008﹣2006×20082007,

=2008×(2007×10000+2007+1)﹣2006×(2008×10000+2007),

=2008×2007×10000+2007×2008+2008﹣2006×2008×10000﹣2006×2007,

=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×,

=50×,

=15+20﹣12,

=35﹣12,

=23;

152. 0.375×,

=×+﹣,

=(+1﹣)×,

=8×,

=3

153. 7.5+2.7+2.7+2.5+4.3

=(7.5+2.5)+(2.7+4.3)+2.7,

=10+7+2.7,

=19.7;

154. 7.9﹣3.27﹣0.73+1.1

=7.9+1.1﹣(3.27+0.73),

=9﹣4,

=5;

155. 72×125

=9×8×125,

=9×(8×125),

=9×1000,

=9000;

156. (80+4)×125

=80×125+4×125,

=10000+500,

=10500;

157. 67×88+67×11+67

=(88+11+1)×67,

=100×67,

=6700.

158. 203×15

=(200+3)×15,

=200×15+3×15,

=3000+45,

=3045

159. 4392﹣2997,

=4392﹣3000+3,

=1392+3,

=1395;

160. 2.5×32×1.25,

=(2.5×4)×(8×1.25),

=10×10,

=100;

161. ×+÷,

=()×,

=1×,

=;

162. 13×+,

=(13+1)×,

=14×,

=6;

163. 9÷[(20.75﹣9.5)]×0.4],

=9÷[11.25×0.4],

=9÷[(10+1.25)×0.4],

=9÷[10×0.4+1.25×0.4],

=9÷[4+0.5],

=9÷4.5,

=2;

164. ÷﹣×,

=﹣×,

=×(1﹣),

=×,

=0.3

165. 1.25×32×2.5,

=(1.25×8)×(4×2.5),

=10×10,

=100;

166. 4×3.5+4.8×7﹣480%,

=4.8×3.5+4.8×7.5﹣4.8×1,

=4.8×(3.5+7.5﹣1),

=4.8×10,

=48;

167. (5﹣1.8)÷[(1.15+)×1],

=(5﹣1)÷[(1+)×],

=÷[×],

=÷3,

=;

168. 3333×224+6666×368,

=3333×224+3333×2×368,

=3333×(224+736),

=3333×960,

=3199680

169. 395﹣283+154+246﹣117

=395+(154+246)﹣(283+117)

=395+400﹣400

=395;

171. 8795﹣4998+2994﹣3002﹣2008

=8795+2994﹣(4998+3002)﹣2008

=11789﹣8000﹣2008

=1781;

171. 1999+999×999

=1999+999×(1000﹣1)

=1999+999000﹣999

=1000+999000

=1000000;

172. 38×25×6

=38×(25×6)

=38×150

=5700

173. 2.06×101

=2.06×(100+1)

=2.06×100+2.06×1

=206+2.06

=208.06;

174. 0.25×125×0.32

=0.25×125×0.4×0.8

=(0.25×0.4)×(125×0.8)

=0.1×100

=10;

175. 1.25×8.8

=1.25×(8+0.8)

=1.25×8+1.25×0.8

=10+1

=11;

176. 31.8×2.5+31.8×7.5

=31.8×(2.5+7.5)

=31.8×10

=318

177. 119×8×125,

=119×(8×125),

=119×1000,

=119000;

178. 38+129+71,

=38+(129+71),

=38+200,

=238;

179. 1756﹣398,

=1756﹣400+2,

=1356+2,

=1358;

180. 406×201,

=406×(200+1),

=406×200+406×1,

=81200+406,

=81606;

181. 16×125,

=2×8×125,

=2×(8×125),

=2×1000,

=2000;

182. 1900÷4÷25,

=1900÷(4×25),

=1900÷100,

=19 

183. 8.35+3.8﹣2.35,

=8.35﹣2.35+3.8,

=6+3.8,

=9.8;

184. 15.4﹣(5.4+2.3),

=15.4﹣5.4﹣2.3,

=10﹣2.3,

=7.7;

185. 98×45,

=(100﹣2)×45,

=100×45﹣2×45,

=4500﹣90,

=4410;

186. 16×125×25,

=(8×125)×(2×25),

=1000×50,

=50000;

187. 12×69﹣69×2,

=(12﹣2)×69,

=10×69,

=690;

188. (20+8)×25,

=20×25+8×25,

=500+200,

=700

189. 9+99+999+9999+99999

=(10﹣1)+(100﹣1)+(1000﹣1)+(10000﹣1)+(100000﹣1)

=10+100+1000+10000+100000﹣5

=111110﹣5

=111105;

190. 1﹣2+3﹣4+5﹣6++1991﹣1992+1993

=1+(3﹣2)+(5﹣4)+(7﹣6)++(1991﹣1990)+(1993﹣1992)

=1+1×996

=997

191. 36×11

=36×(10+1)

=36×10+36×1

=360+36

=396;

192. 246×11

=246×(10+1)

=246×10+246×1

=2460+246

=2706

193. 678+354+322

=678+322+354

=1000+354

=1354;

194. 283+147+17+1653

=283+17+(147+1653)

=300+1800

=2100;

195. 384﹣(37+184)

=384﹣(184+37)

=384﹣184﹣37

=200﹣37

=163;

196. 2904﹣1327﹣173

=2904﹣(1327+173)

=2904﹣1500

=1404;

197. 653﹣197

=653﹣200+3

=453+3

=456;

198. 125×17﹣125

=125×(17﹣1)

=125×16

=125×8×2

=1000×2

=2000;

199. 235×99

=235×(100﹣1)

=235×100﹣235×1

=23500﹣235

=23265;

200. (1300﹣520)÷13

=1300÷13﹣520÷13

=100﹣40

=60;

201. 67×21+18×21+85×79

=21×(67+18)+85×79

=21×85+85×79

=85×(21+79)

=85×100

=8500;

202. 222222×999999

=222222×(1000000﹣1)

=222222×1000000﹣222222×1

=222222000000﹣222222

=222221777778

203. 18×+2,

=×+2,

=17.67+2,

=19.67;

204. ×﹣,

=﹣,

=﹣,

=﹣;

205. 0.8×7.3﹣63×20.08

=5.84﹣1265.04,

=﹣1259.2;

206. 65.5﹣4.29+24.6﹣5.71,

=(65.5+24.6)﹣(4.29+5.71),

=90.1﹣10,

=80.1;

207. 1991+1995+2000+1989+2011+2005+1998+1993,

=(2000﹣9)+(2000﹣5)+2000+(2000﹣11)+(2000+11)+(2000+5)+(2000﹣2)+(2000﹣7),

=2000×8﹣9﹣5﹣11+11+5﹣2﹣7,

=16000﹣18,

=15982

208. 99999×22222+33333×33334,

=33333×3×22222+33333×33334,

=33333×(66666+33334)

=33333×100000,

=3333300000;

209. 2003×2004÷2004×2004﹣2003×2004,

=2003×2004﹣2003×2004,

=0;

210. 2.8×(+),

=2.8×+2.8×,

=0.4+0.3,

=0.7;

211. 101×,

=(102﹣1)×,

=102×﹣1×,

=99﹣,

=98;

212. 9.81×10%+0.5×98.1+0.049×981,

=9.81×0.1+5×9.81+4.9×9.81,

=9.81×(0.1+5+4.9),

=9.81×10,

=98.1;

213. 23×+14×,

=23×+16×,

=(23+16)×,

=39×,

=14

214. 38.4×187﹣15.4×384+3.3×16

=38.4×(187﹣154)+3.3×16

=38.4×33+3.3×16

=3.3×(384+16)

=3.3×400

=1320

215. 3﹣(0.16+1)﹣1.84,

=3﹣0.16﹣1﹣1.84,

=3﹣1﹣(0.16+1.84),

=2﹣2,

=0;

216. 2009÷2009,

=2009,

=2009,

=2009×,

=;

或1÷(2009÷2009),

=1÷1,

=.

217. 9+99+999+9999﹣,

=[(9+99+999+9999)+()]﹣,

=[10+100+1000+10000﹣4+]﹣,

=11110﹣4,

=11106;

218. 4.03÷12.5,

=(4.03×8)÷(12.5×8),

=32.24÷100,

=0.3224

219. 1997+1998+1999+2001

=(2000﹣3)+(2000﹣2)+(2000﹣1)+(2000+1)

=2000×4﹣5

=7995;

220. 3425﹣188﹣212﹣25

=3425﹣(188+212)﹣25

=3425﹣400﹣25

=3000;

221. 567×999+567×2

=567×(999+2)

=567×(1000+1)

=567×1000+567

=567000+567

=567567;

222. (91×48×75)÷(25×13×16)

=(63×25×13×16)÷(25×13×16)

=63×(25×13×16)÷(25×13×16)

=63

223..×3+×5+×10,

=×(3+5+10),

=×18,

=5;

224. 999×7+111×7,

=7×(999+111),

=7×1110,

=7770,

225. 97×,

=(96+1)×,

=96×+1×,

=5+,

=5;

226. (+++)×2002,

=×2002+×2002+×2002+×2002;

=1001+286+182+154,

=1623;

227. 8.5×+0.75×5+6.5÷1,

=8.5×+×5+6.5×,

=×(8.5+5+6.5),

=×20,

=15;

228. ++++,

=+++++++++﹣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,

=200;

235. 1200﹣128﹣72,

=1200﹣(128+72),

=1200﹣200,

=1000;

236. 3000÷125÷8,

=3000÷(125×8),

=3000÷1000,

=3

237. 65×8.7+6.5×0.23﹣0.65

=565.5+1.495﹣0.65,

=566.995﹣0.65,

=566.345;

238. ,

=1…,

=1﹣,

=

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