当前位置: 首页 > 小学 > 五年级

五年级数学题计算题,小学5年级数学混合运算题

  • 五年级
  • 2023-10-22

五年级数学题计算题?26.86×25.66-16.86×25.66 =(26.86-16.86) ×25.66 =10×25.66 =256.6 例8、 5.7×99+5.7 = 5.7×(99+1) =5.7×100 =570 例9、34×9.9 =34×(10-0.1) =34×10-34×0.1 =340-3.4 =336.6 例10、那么,五年级数学题计算题?一起来了解一下吧。

五年级数学计算题有哪些呢?

0.8÷[14-(9.85+1.07)][60-(9.5+28.9)]÷0.182.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15]28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕(31.8+3.2×4)÷531.5×4÷(6+3)0.64×25×7.8+2.2 2÷2.5+2.5÷2194-64.8÷1.8×0.936.72÷4.25×9.95180-705×624÷2.4-2.5×0.8(4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189)3.416÷(0.016×35)0.8×[(10-6.76)÷1.2]19.4×6.1×2.3 5.67×0.2-0.62 18.1×0.92+3.930.0430.24+0.875 0.4×0.7×0.250.75×102100-56.23 0.78+5.436+14.07×0.86+9.12.5 添加评毁拦论 .评论读取中腔余前...请后再发表评论!取消 .ityy | 2009-04-28 11:57:25有0人认为这个回答不错 | 有0人认伍清为这个回答没有帮助30.8÷[14-(9.85+1.07)] [60-(9.5+28.9)]÷0.18 2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15] 28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1 777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕 (31.8+3.2×4)÷5 31.5×4÷(6+3) 0.64×25×7.8+2.2 2÷2.5+2.5÷2 194-64.8÷1.8×0.9 36.72÷4.25×9.9 5180-705×6 24÷2.4-2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189) 3.416÷(0.016×35) 0.8×[(10-6.76)÷1.2] 19.4×6.1×2.3 5.67×0.2-0.62 18.1×0.92+3.93 0.0430.24+0.875 0.4×0.7×0.25 0.75×102 100-56.23 0.78+5.436+1 4.07×0.86+9.12.5 30.8÷[14-(9.85+1.07)] [60-(9.5+28.9)]÷0.18 2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15] 28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1 777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕 (31.8+3.2×4)÷5 31.5×4÷(6+3) 0.64×25×7.8+2.2 2÷2.5+2.5÷2 194-64.8÷1.8×0.9 36.72÷4.25×9.9 5180-705×6 24÷2.4-2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189) 3.416÷(0.016×35) 0.8×[(10-6.76)÷1.2] 19.4×6.1×2.3 5.67×0.2-0.6218.1×0.92+3.93 0.0430.24+0.8750.4×0.7×0.25 0.75×102 100-56.230.78+5.436+1 4.07×0.86+9.12.5

五年级上册数学简便计算30道题及答案

用简便方法计算

①89+124+11+26+48 ②875-147-23

③147×8+8×53 ④125×64

计算下面各题.

1.280+840÷24×5 2.85×(95-1440÷24)

3.58870÷(105+20×2) 4.蠢滚歼80400-(4300+870÷15)

5.1437×27+带冲27×563 6.81432÷(13×52+78)

7.125×(33-1) 8.37.4-(8.6+7.24-6.6)

计算。(1∶1)

(1)156×107-7729 (2)37.85-(7.85+6.4)

(3)287×5+96990÷318 (4)1554÷[(72-58)×3]

脱式计算

2800÷ 100+789 (947-599)+76×64

1.36×(913-276÷23) 2.(93+25×21)×9

3.507÷13×63+498 4.723-(521+504)÷25

5.384÷12+23×371 6.(39-21)×(396÷6)

(1)156×[(17.7-7.2)÷3] (2)[37.85-(7.85+6.4)] ×30

(3)28×(5+969.9÷318) (4)81÷[(72-54)×9]

57×12-560÷35 848-640÷16×12

960÷(1500-32×45) [192-(54+38)备族]×67

138×25×4 (13×125)×(3×8) (12+24+80)×50 704×25 25×32×125 32×(25+125)

178×101-178 84×36+64×84 75×99+2×75 83×102-83×2 98×199

123×18-123×3+85×123 50×(34×4)×3 25×(24+16) 178×99+178

79×42+79+79×57 7300÷25÷4 8100÷4÷75 75×27+19×2 5 31×870+13×310

4×(25×65+25×28) 138×25×4 (13×125)×(3×8) (12+24+80)×50

25×32×125 32×(25+125) 102×76 58×98

178×101-178 84×36+64×84 75×99+2×75 83×102-83×2

98×199 123×18-123×3+85×123 50×(34×4)×3 25×(24+16)

178×99+178 79×42+79+79×57 7300÷25÷4 8100÷4÷75

五年级数学计算题100道

9405-2940÷28×21

920-1680÷40÷7

690+47×52-398

148+3328÷64-75

360×24÷32+730

2100-94+48×54

51+(2304-2042)×23

4215+(4361-716)÷81

(247+18)×27÷25

36-720÷(360÷18)

1080÷(63-54)×80

(528+912)×5-6178

8528÷41×38-904

264+318-8280÷69

(174+209)×26- 9000

814-(278+322)÷15

1406+735×9÷45

3168-7828÷38+504

796-5040÷(630÷7)

285+(3000-372)÷36

1+5/6-19/12

3x(-9)+7x(-9

(-54)x1/6x(-1/3)

1.18.1+(3-0.299÷0.23)×1

2.(6.8-6.8×0.55)÷8.5

3.0.12× 4.8÷0.12×4.8

4.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6

5.6-1.6÷4= 5.38+7.85-5.37=

6.7.2÷0.8-1.2×5= 6-1.19×3-0.43=

7.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9

8.10.15-10.75×0.4-5.7

9.5.8×(3.87-0.13)+4.2×3.74

10.32.52-(6+9.728÷3.2)×2.5

11.[(7.1-5.6)×0.9-1.15] ÷2.5

12.5.4÷[2.6×(派余斗3.7-2.9)+0.62]

13.12×6÷(12-7.2)-6

14.12×6÷7.2-6

15.33.02-毁谨(148.4-90.85)÷2.5

7×(5/21+9/714)

50.32.52-(6+9.728÷3.2)×2.5 0.45×2.5= 0.8×1.25=0.3×3.6= 0.3×0.3= 10×0.07=0.3×1.4=0.05×7= 0.92×0.4= 0.2×0.26= 0.14×4= 0.02×0.1=1.2×0.3=0.2×0.4=8.2+1.8= 100-35.22= 2.3×4=

2.5×0.4=2.4×5=0.22×4=尘磨3.25×0=

0.9-0.52= 3.99×1= 0×3.52=12.5×8=

8÷10 = 10-1.8-7.2= 0.43+3.57=2.5×4×12=

0.9×0.8=7.5x-3x = a+3a+7a==1.05×100=1÷0.5=0.96÷3= 1.47÷0.7= 5.4÷6=

0.16.5×10=0.56×100= 3.78×100= 4÷0.8 =

3.215×100=0.8×10= 4.08×100=1.1×0.2 =

0.6×0.8 = 3×0.9= 2.5×0.4=3.6×0.4=

12.5×8=50×0.04= 80×0.3 = 1.1×9=

0.16×5 = 1.78+2.2 = 9.6÷0.6 =1.2×0.5-0.4 =0.7÷0.01 = 2.5×0.4 = 12-3.9=1.25×8÷1.25 = 6.6÷0.66 =5.37×0+4.63 = 3.9+2.03=4.2÷3.5=

1.6+2.4×0.3 = 2.14-0.9=27+456+73= 0.3×0.3=

7.2+2.8=0.9÷0.01=12÷0.3= 2.87÷0.7=

13÷4= 0.96÷0.3=1.5×0.4= 7÷0.25= 2.5×0.7×0.8=8-2.5= 16÷1.6= 5.6×1.01= 8×(2.5+0.25)= 0.36+0.64= 64.32÷16= 4.2÷0.1=

72.8÷0.8= 8.4÷4.2= 13.8+9.9=2.4×2.5=

0.05×0.8= 2.56-0.37= 1.25×0.8×0.5=12×2.5=1.23×3=3.2÷1.6= 3.5+3.5×3= 19.6÷2= 8.8÷2.2= 0.75×4=(1.5+0.25)×4= 0.5×0.8=

8.4×0.2=1.6×0.2=7.2×0.3= 2.8×0.3=0.9÷0.15= 1.8×0.4=5.5÷0.55= 0.08×100=

2.2÷0.11=5.46+4.54= 12.5×0.8= 0.35×0.3=

1.4×5=2.8×4=19.6÷4= 22.5×4=

2、用竖式计算

0.396÷1.2=0.756÷0.36=15.6×13=

0.18×15= 0.025×14=3.06×36=

0.04×0.12= 3.84×2.6≈ 5.76×3=

(保留一位小数)

7.15×22 90.75÷3.33.68×0.25

16.9÷0.131.55÷3.93.7×0.016

13.76×0.8= 5.2×0.68.4×1.3

6.4×0.54.48×0.45.25×5

35.4×4.20.042×0.54 0.76×0.32

1. 3/7 × 49/9 - 4/3

2. 8/9 × 15/36 + 1/27

3. 12× 5/6 – 2/9 ×3

4. 8× 5/4 + 1/4

5. 6÷ 3/8 – 3/8 ÷6

6. 4/7 × 5/9 + 3/7 × 5/9

7. 5/2 -( 3/2 + 4/5 )

8. 7/8 + ( 1/8 + 1/9 )

9. 9 × 5/6 + 5/6

10. 3/4 × 8/9 - 1/3

11. 7 × 5/49 + 3/14

12. 6 ×( 1/2 + 2/3 )

13. 8 × 4/5 + 8 × 11/5

14. 31 × 5/6 – 5/6

15. 9/7 - ( 2/7 – 10/21 )

16. 5/9 × 18 – 14 × 2/7

17. 4/5 × 25/16 + 2/3 × 3/4

18. 14 × 8/7 – 5/6 × 12/15

19. 17/32 – 3/4 × 9/24

20. 3 × 2/9 + 1/3

21. 5/7 × 3/25 + 3/7

22. 3/14 ×× 2/3 + 1/6

23. 1/5 × 2/3 + 5/6

24. 9/22 + 1/11 ÷ 1/2

25. 5/3 × 11/5 + 4/3

26. 45 × 2/3 + 1/3 × 15

27. 7/19 + 12/19 × 5/6

28. 1/4 + 3/4 ÷ 2/3

29. 8/7 × 21/16 + 1/2

30. 101 × 1/5 – 1/5 × 21

31.50+160÷40

32.120-144÷18+35

33.347+45×2-4160÷52

34(58+37)÷(64-9×5)

35.95÷(64-45)

36.178-145÷5×6+42

37.812-700÷(9+31×11)

38.85+14×(14+208÷26)

39.(284+16)×(512-8208÷18)

40.120-36×4÷18+35

41.(58+37)÷(64-9×5)

42.(6.8-6.8×0.55)÷8.5

43.0.12× 4.8÷0.12×4.8

44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6

45.6-1.6÷4= 5.38+7.85-5.37=

46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=

47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9

48.10.15-10.75×0.4-5.7

49.5.8×(3.87-0.13)+4.2×3.74

50.32.52-(6+9.728÷3.2)×2.

51.(136+64)×(65-345÷23)

52. 420+580-64×21÷28

53.(58+370)÷(64-45)

6.9+4.8+3.10.456+6.22+3.7815.89+(6.75-5.8)*6

4.02+5.4+0.98 5.17-1.8-3.2 13.75-(3.75+6.48)*6

3.68+7.56-2.68 7.85+2.34-0.85+4.6635.6-1.8-15.6-7.2

3.82+2.9+0.18+9.1 9.6+4.8-3.6 7.14-0.53-2.47

5.27+2.86-0.66+1.63 13.35-4.68+2.65 73.8-1.64-13.8-5.36

47.8-7.45+8.80.398+0.36+3.6415.75+3.59-0.59+14.25

66.86-8.66-1.34 0.25×16.2×4 (1.25-0.125)×8

3.6×1023.72×3.5+6.28×3.5 36.8-3.9-6.1

15.6×13.1-15.6-15.6×2.1 4.8×7.8+78×0.52 32+4.9-0.9

4.8×100.156.5×9.9+56.57.09×10.8-0.8×7

25.48-(9.4-0.52) 4.2÷3.5320÷1.25÷8

18.76×9.9+18.76 3.52÷2.5÷0.4 3.9-4.1+6.1-5.9

5.6÷3.59.6÷0.8÷0.44.2×99+4.2

17.8÷(1.78×4) 0.49÷1.4 1.25×2.5×32 3.65×10.1

15.2÷0.25÷40.89×100.1146.5-(23+46.5)

3.83×4.56+3.83×5.444.36×12.5×89.7×99+9.7

27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 0.65×1013.2×0.25×12.5

(45.9-32.7)÷8÷0.125 3.14×0.68+31.4×0.0325.6÷1.25÷0.8÷2.5÷0.4

7.2×0.2+2.4×1.48.9×1.01 7.74×(2.8-1.3)+1.5×2.2

3.9×2.7+3.9×7.318-1.8÷0.125÷0.812.7×9.9+1.27

21×(9.3-3.7)-5.615.02-6.8-1.025.4×11-5.4

2.3×16+2.3×23+2.39.43-(6.28-1.57)3.65×4.7-36.5×0.37

46×57+23×86 13.7×0.25-3.7÷4 2.22×9.9+6.66×6.7

101×0.87-0.91×8710.7×16.1-15.1×10.70.79×199

4.8+8.63+5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.24

2.35+1.713+0.287+7.651.57+0.245+7.43 6.02+3.6+1.98

0.134+2.66+0.8661.27+3.9+0.73+16.1 7.5+4.9-6.5

3.07-0.38-1.62 1.29+3.7+2.71+6.38-2.45-1.5

3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.20.32×403

3.2+0.36+4.8+1.641.23+3.4-0.23+6.60.25×36

12.7-(3.7+0.84)36.54-1.76-4.540.25×0.73×5

7.6×0.8+0.2×7.6 0.85×1990.25×8.5×4

1.28×8.6+0.72×8.6 12.5×0.96×0.810.4-9.6×0.5

0.8×(4.3×1.25)3.12+3.12×9928.6×101-28.3

0.86×15.7-0.86×14.7 2.4×1022.31×1.2×0.5

14-7.32-2.682.64+8.67+7.36+11.33 70÷28

(2.5-0.25)×0.49.16×1.5-0.5×9.163.6-3.6×0.5

63.4÷2.5÷0.4 4.9÷1.43.9÷(1.3×5)

(7.7+1.54)÷0.7 2.5×2.4 2.7÷45 15÷(0.15×0.4)

0.35×1.25×2×0.832.4×0.9+0.1×32.4 15÷0.25

0.25×0.046 2.52×3.41.08×25

0.12×0.5×0.16= 4.8×0.25=0.125×1.4≈

(保留两位小数)

2.5÷0.7= (保留三位小数) 10.1÷3.3= (商用循环小数)

10.75÷12.5= (用乘法验算)3.25×9.04= (用除法验算)

3、脱式计算(能简算的要简算)

2.5×7.1×416.12×99+16.125.2×0.9+0.9

7.28×99+7.28 4.3×50×0.264-2.64×0.5

26×15.7+15.7×24 (2.275 +0.625)×0.28

3.94+34.3×0.2 1.2×(9.6÷2.4)÷4.8

8.9×1.1×4.72.7×5.4×3.9 3.6×9.85-5.46

8.05×3.4+7.66.58×4.5×0.92.8×0.5+1.58

32+4.9-0.94.8-4.8×0.5(1.25-0.125)×8

4.8×100.156.5×99+56.5 7.09×10.8-0.8×7.09

4.85 + 0.35 ÷ 1.48.7 × 17.4 - 8.7 × 7.4

12.5×0.4×2.5×80.87×3.16+4.649.5×101

0.68 ÷(5.2 -3.5)× 1.25

40.5 ÷ 0.81 × 0.184.8 ×(15 ÷ 2.4)2.13.×0.×8257

6.81+6.81×99 0.25×185×40 4.4×0.8-3.4×0.8

(9.37+9.37+9.37+9.37)× 2.54.2.×1.+1.×1.75

2.37×6.3+2.37×3.7 2.5×1.25×0.323.8×10.1

2.5×(3.8×0.04) 7.69×101 3.8×10.1

0.25×39+0.250.125×72 46×0.33+54×0.33

(8×5.27) ×1.256.81+6.81×99 0.25×185×40

6.8×0.75÷0.5 3.75÷0.125–2.75 1.53+23.4÷7.2

9.5×9913.5×0.98 12.5×8.8

二、解方程:

54-X=24 7X=49 126÷X=42

13+A=28.52.4X=26.47.5x-3x=18

5×1.3-2x=5.5 24x+6x=63.65.6x+4.4x=5.2

三、列式计算

1、20减去0.8的差除以4个0.3的和,商是多少?

2、一个数的2.6倍加上9,和是35,求这个数。

五年级下册数学简便计算题及答案含解析

您好!

31.50+160÷40 (58+370)÷(64-45)

32.120-144÷18+35

33.347+45×2-4160÷52

34(58+37)÷(64-9×5)

35.95÷(64-45)

36.178-145÷5×6+42 420+580-64×21÷28

37.812-700÷(9+31×11) (136+64)×(65-345÷23)

38.85+14×(14+208÷26)

23) 1.2×2.5+0.8×2.5

24) 8.9×1.25-0.9×1.25

25) 12.5×7.4×0.8

26) 9.9×6.4-(2.5+0.24)

(27) 6.5×9.5+6.5×0.5

0.35×1.6+0.35×3.4

6.72-3.28-1.72

0.45+6.37+4.55

5.4+6.9×3-(25-2.5)2×41846-620-380

4.8×46+4.8×54

0.8+0.8×2.5

1.25×3.6×8×2.5-12.5×2.4

28×12.5-12.5×20

23.65-(3.07+3.65)

(4+0.4×0.25)8×7×1.25

1.65×99+1.65

27.85-(7.85+3.4)

48×1.25+50×1.25×0.2×8

7.8×9.9+0.78

(1010+309+4+681+6)×12

3×9146×782×6×854

5.15×7/8+6.1-0.60625

39.(284+16)×(512-8208÷18)

40.120-36×4÷18+35

41.(58+37)÷(64-9×5)

42.(6.8-6.8×0.55)÷8.5

43.0.12× 4.8÷0.12×4.8

44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)老神察÷1.6

45.6-1.6÷4= 5.38+7.85-5.37=

46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=

47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9

48.10.15-10.75×0.4-5.7

49.5.8×(3.87-0.13)+4.2×3.74

50.32.52-(6+9.728÷3.2)×2.5

51.[(7.1-5.6)×0.9-1.15] ÷2.5

52.5.4÷[2.6×(3.7-2.9)+0.62]

53.12×6÷(12-7.2)-6 (4)12×6÷7.2-6

102×4.5

7.8×6.9+2.2×6.9

5.6×0.25

8×(20-1.25)

1)127+352+73+44 (2)89+276+135+33

(1)25+71+75+29 +88 (2)243+89+111+57

9405-2940÷28×21

920-1680÷40÷7

690+47×52-398

148+3328÷64-75

360×24÷32+730

2100-94+48×54

51+(2304-2042)×23

4215+(4361-716)÷81

(247+18)×27÷25

36-720÷(360÷18)

1080÷(63-54)×80

(528+912)×5-6178

8528÷41×38-904

264+318-8280÷69

(174+209)×26- 9000

814-(278+322)÷15

1406+735×9÷45

3168-7828÷38+504

796-5040÷(630÷7)

285+(3000-372)÷36

1+5/6-19/12

3x(-9)+7x(-9

(-54)x1/6x(-1/3)

1.18.1+(3-瞎燃0.299÷0.23)×1

2.(6.8-6.8×0.55)÷8.5

3.0.12× 4.8÷0.12×4.8

4.(3.2×1.5+2.5)÷1.6 (2)侍茄3.2×(1.5+2.5)÷1.6

5.6-1.6÷4= 5.38+7.85-5.37=

6.7.2÷0.8-1.2×5= 6-1.19×3-0.43=

7.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9

8.10.15-10.75×0.4-5.7

五年级数学简便计算题大全带答案

五年级下册数学简银慧便计算题及答案含解析

班级: 姓名:

一、口算下面各题。(23分)

10-2.65= 0.9×0.08= 528-349= 6+14.4= 24÷0.04=

12.34-2.3= 0÷3.8= 0.77+0.33= 7÷1.4=察毕 67.5+0.25=7.2÷8×4= 5-1.4-1.6= 400÷125÷8= 1.9×4×0.5=

80×0.125= 3× = 6 6= 2 -( + )= 10 2=

3.2×7÷3.2×7= ( - )×12= 187.7×11-187.7= 1- 62.5%=

二、写出下列每题在简便运算时所运用的定律或性质(12分)

4 +3.2+5 +6.8 25×(8×0.4)×1.25 7 -(2 - )

( ) ( ) ( )

( + + )×72 93.5÷3 16÷2.5

( ) ( ) ( )

三、用简便方法计算。(65分)

1125-997 998+1246+9989 (锋没答8700+870+87)÷87

125×8.8 1.3+4.25+3.7+3.75 17.15-(3.5-2.85)

3.4×99+3.4 4.8×1.01 0.4×(2.5÷73)

(1.6+1.6+1.6+1.6)×25 ( + - )÷

12.3-2.45-5.7-4.55 2 + 0.125×0.25×64

64.2×87+0.642×1300 78×36+7.8×741-7 17+ 8

0.125× +0.5 2.42 +4.58 -43

25÷100 4.25-3 -(2 -1 )

(1)1.25*17.6+36.1/0.8+2.36*12.5

1.25*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=96.625

(2)7.5*2.3+1.9*2.5

7.5*2.3+1.9*2.5

=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*2005

2004/2003*2005

=(2004/2003)*(2003+2)

=2004+4008/2003

(4)276*543-267/276+543*275

276*543-267/276+543*275

=543*(276+275)-267/276

=543*551-267/276

1)五十二又二十五分之十一×79.45+159×47.56+七十九又二十分之十一×52.44

=52.44×79.45+159×47.56+79.55×52.44

=52.44×(79.45+79.55)+159×47.56

=52.44×159+159×47.56

=159×(52.44+47.56)

=159×100

=15900

3)2002+2001-2000-1999+1998+1997-1996-1995+……+2+1

=(2002-2000)+(2001-1999)+(1998-1996)+(1997-1995)+……+(6-4)+(5-3)+2+1

=2+2+2+2+……+2+2(从3-2002共2000个数,所以有1000个2)+2+1

=1000×2+2+1

=2003

4,5两题均用到一个转换式1/(A×B)=1/(B-A)×(1/A-1/B)

如1/15=1/(3×5)=1/(5-3)×(1/3-1/5)=1/2×(2/15)=1/15可验证一下

4)(1×2分之一)+(2×3分之一)+(3×4分之一)+……+(10×11分之一)

=1/(1×2)+1/(2×3)+1/(3×4)+……+1/(10×11)

=(1-1/2)+(1/2 - 1/3)+(1/3 - 1/4)+……+(1/10 - 1/11)

=1-1/11

=10/11

5)三分之一+十五分之一+三十五分之一+六十三分之一+九十九分之一

=1/(1×3)+1/(3×5)+1/(5×7)+1/(7×9)+1/(9×11)

=1/2×(1-1/3)+1/2×(1/3-1/5)+1/2×(1/5-1/7)+1/2×(1/7-1/9)+1/2×(1/9-1/11)

=1/2×(1 - 1/3 + 1/3 - 1/5 + 1/5 - 1/7 + 1/7 - 1/9 + 1/9 - 1/11)

=1/2×(1-1/11)

=1/2×10/11

=5/11

6)一又二分之一-六分之五+十二分之七-二十分之九+三十分之十一-四十二分之十三+五十六分之十五

(根据提示,1又1/2=1+1/2,+1/2+1/3=5/6……)

=(1+1/2)-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)

=1+ 1/2 - 1/2 - 1/3 + 1/3 + 1/4 - 1/4 - 1/5 + 1/5 + 1/6 - 1/6 - 1/7 + 1/7 + 1/8

=1+1/8

=9/8

仔细看一下,不会很难,都可以简便算的。

以上就是五年级数学题计算题的全部内容,小学五年级数学计算题如下:1、4.9×0.7=3.43 2、0.87-0.49=0.38 3、8+2-8+2 4、25*4/25*4 5、7.26-(5.26-1.5)6、286+198 7、314-202 8、526+301 9、223-99 10、。

猜你喜欢