Primary four grade calculation questions four-digit, to three thousand questions, everyone help ah!

1. 125*3 + 125*5 + 25*3 + 25

2. 9999*3 + 101*11*(101-92)

3.(23/4-3/4)*(3*6+2)

4. 3/7 × 49/9 - 4/3

5. 8/9 × 15/36 + 1/27

6. 12 × 5/6 - 2/9 × 3

7. 8 × 5/4 + 1/4

8. 6÷ 3/8 - 3/8 ÷ 6

9. 4/7 × 5/9 + 3/7 × 5/9

10. 5/2 - (3/2 + 4/5 ) 4/9 × 3= 5 ÷ 1/3 = 1/2 ÷ 1/3 =

21/25 ÷ 42= 4/5 × 3/4 = 8.7 × 0.2=

4 × 0.25= 1/7 × 14= 2/3 ÷ 5/6=

1.25 × 8= 3/5 ÷ 5/8 = 6/7 × 3/2=

6 × 8.8= 4/11 ÷ 4= 4/9 × 3/8=

5/3÷5= 0÷8/3= 4/7-2/3=

2/7×2= 41/12×4= 4÷3/16=

12÷9/4= 75/8 ÷5= 12×16/9=

2/3×3= 8÷9/4 = 5/3÷3/5=

4/5 x 5/8 = 7/9 x 9/7 = 2.64 + 3.6 =

2.4 x 50 = 3500 ÷ 70 = 2050-298 =

2 + 7 ÷ 9 = 0.3 ÷ 3% = 286 + 198 =

314-202 = 526 + 301 = 223 - 99 =

1/2×3/5= 1. 89÷100= 0.82+0.08=

73×1= 0.63×10= 4÷10=

17÷1000= 0.56+0.4= 1.25×100=

5.6+99= 43×63/21= 100÷25=

1-0.93= 90-0.9= 18.3×1/3=

794-198= 68×25= 43.3-63/21 =

72×125= 3001-1998= 23/5×5/6 =

20/3×12= 1/2-1/6= 30.25×4 /5 =

5/6-1/2 = 1/2 × 1/5 =

11. 7/8 + (1/8 + 1/9)

12. 9 × 5/6 + 5/6

13. 3/4 × 8/9 - 1/3

14. 7 × 5/49 + 3/14

15. 6 × (1/2 + 2/3) )

16. 8 × 4/5 + 8 × 11/5

17. 31 × 5/6 - 5/6

18. 9/7 - (2/7 - 10/21 )

19. 5/9 × 18 - 14 × 2/7

20. 4/5 × 25/16 + 2/3 × 3/4

21. 14 × 8/7 - 5/6 × 12/15

22. 17/32 - 3/4 × 9/24

23. 3 × 2/9 + 1/3

24. 5/7 × 3/25 + 3/7

25. 3/14 × × 2/3 + 1/6

26. 1/5 × 2/3 + 5/6

27. 9/22 + 1/11 ÷ 1/2

28. 5/3 × 11/5 + 4/3

29. 45 × 2/3 + 1/3 × 15

30. . 7/19 + 12/19 × 5/6

31. 1/4 + 3/4 ÷ 2/3

32. 8/7 × 21/16 + 1/2

33. 101 × 1/5 - 1/5 × 21

34.50 + 160 ÷ 40

35.120- 144 ÷ 18 + 35

36.347 + 45 × 2 - 4160 ÷ 52

37 (58 + 37) ÷ (64 - 9 × 5)

38.95 ÷ (64 - 45)

39.178 - 145 ÷ 5 × 6 + 42

40.812 - 700 ÷ (9 + 31 × 11 ) 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 (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)

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

45. 6-1.6÷4= 5.38+7.85- 5.37

46. 7.2 ÷ 0.8-1.2 × 5

47. 6.5 × (4.8-1.2 × 4)

48. 1 0.15-10.75 × 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

1.(1/69 + 2/71) times 23 + 25 divided by 71

=23/69 + 46/71 + 25/71

=1/3 + 71/71 = 1 and 1/3.

2.(1+1/2) times (1-1/2) times (1+1/3) times (1-1/3) times ........ Multiply (1+1/9) by (1-1/9)

=3/2*1/2*4/3*2/3*5/4*..... .10/9*8/9

=1/2*10/9

=10/18.

3.1/2 times 3+1/3 times 4+....... +1/19 by 20

4.1/27+505/2727+131313/272727

5.100-98+96-94+.... +4-2

1.125*3+125*5+25*3+25

2.9999*3+101*11*(101-92)

3.(23/4-3/4)*(3*6+2)

4. 3/7 × 49/9 - 4/3

5. 8/9 × 15/36 + 1/27

6. 12 × 5/6 - 2/9 × 3

7. 8 × 5/4 + 1/4

8. 6÷ 3/8 - 3/8 ÷ 6

9. 4/7 × 5/9 + 3/7 × 5/9

10. 5/2 - (3/2 + 4/5 )

11. 7/8 + (1/8 + 1/9 )

12. 9 × 5/6 + 5/6

13. 3/4 × 8/9 - 1/3

14. 7 × 5/49 + 3/14

15. 6 × (1/2 + 2/3)

16. 8 × 4/5 + 8 × 11/ 5

17. 31 × 5/6 - 5/6

18. 9/7 - (2/7 - 10/21 )

19. 5/9 × 18 - 14 × 2/7

20. 4/5 × 25/16 + 2/3 × 3 /4

21. 14 × 8/7 - 5/6 × 12/15

22. 17/32 - 3/4 × 9/24

23. 3 × 2/9 + 1/3

24. 5/7 × 3/25 + 3/7

25. 3/9 - 14 × × 2/3 + 1/6

26. 14 × × 2/3 + 1/6

26. 1/5 × 2/3 + 5/6

27. 9/22 + 1/11 ÷ 1/2

28. 5/3 × 11/5 + 4/3

29. 45 × 2/3 + 1/3 × 15

30. 7/19 + 12/19 × 5/6

31. 1/4 + 3/4 ÷ 2/3

32. 8/7 × 21/16 + 1/2

33. 101 × 1/5 - 1/5 × 21

34.50 + 160 ÷ 40

35.120-144 ÷ 18 + 35

36.347 + 45 × 2 - 4160 ÷ 52

37 (58 + 37) ÷ (64 - 9 × 5)

38.95 ÷ (64 - 45)

39.178 - 145 ÷ 5 × 6 + 42

40.812 - 700 ÷ (9 + 31 × 11)

41.85 + 14 × (14 + 208÷26)

43.120-36×4÷18+35

44.(58+37)÷(64-9×5)

45.(6.8-6.8×0.55)÷8.5

46.0.12× 4.8÷0.12×4.8

47.(3.2×1.5 +2.5)÷1.6

48.6-1.6÷4= 5.38+7.85-5.37=

49.7.2÷0.8-1.2×5= 6-1.19×3-0.43=

50.6.5×(4.8-1.2×4)=

51.5.8×(3.87-0.13 ) + 4.2 × 3.74

52.32.52 - (6 + 9.728 ÷ 3.2) × 2.5

53.[(7.1-5.6) × 0.9-1.15] ÷ 2.5

54.5.4 ÷ [2.6 × (3.7-2.9) + 0.62]

55.12 × 6 ÷ (12 - 7.2)-6

56.12×6÷7.2-6

57.0.68×1.9+0.32×1.9

58.58+370)÷(64-45)

59.420+580-64×21÷28

60.136+6×(65-345÷23 )

15-10.75×0.4-5.7

62.18.1 + (3-0.299÷0.23)×1

63.(6.8-6.8×0.55)÷8.5

64.0.12× 4.8÷0.12×4.8

65.(3.2×1.5+2.5)÷1.6

66.3.2×6+(1.5+2.5)÷1.6

67.0.68×1.9+0.32×1.9

68.10.15-10.75×0.4-5.7

69.5.8×(3.87-0.13) +4.2×3.74

70.32.52-(6+9.728÷3.2)×2.5

71.[(7.1-5.6)×0.9-1.15] ÷2.5

72.5.4÷[2.6×(3.7-2.9)+0.62]

73.12×6÷(12- 7.2)-6

74.12×6÷7.2-6

75.33.02-(148.4-90.85)÷2.5

1) 76.(25%-695%-12%)*36

77./4*3/5+3 /4*2/5

78.1-1/4+8/9/7/9

79.+1/6/3/24+2/21

80./15*3/5

81.3/4/9/10-1/6

82./3+1/2)/5/6-1/3]/1/7

83./5+3/5/2+3/4

84.(2-2/3/1/2)]*2/5

85.+5268.32-2569

86.3+456-52*8

87.5%+6325

88./2+1/3+1/4

2) 89 + 456 - 78

3) 5% + . 3/7 × 49/9 - 4/3

4) 9 × 15/36 + 1/27

5) 2 × 5/6 - 2/9 × 3

6) 3 × 5/4 + 1/4

7) 94÷ 3/8 - 3/8 ÷ 6

8) 95/7 × 5/9 + 3/7 × 5/9

9) 6/2 - (3/2 + 4/5)

10) 8 + (1/8 + 1/9)

11) 8 × 5/6 + 5/6

12) 1/4 × 8/9 - 1/3

13) 10 × 5/49 + 3/14

14) 1.5 × (1/2 + 2/3)

15) 2/9 × 4/5 + 8 × 11/5

16) 3.1 × 5/6 - 5/6

17) 4/7 - (2/7 - 10/21)

18) 19 × 18 - 14 × 2/7

19) 5 × 25/16 + 2/3 × 3/4

20) 4 × 8/7 - 5/6 × 12/15

21) 7/32 - 3/4 × 9/24

22) 1, 2/ 3 ÷ 1/2-1/4 × 2/5

2. 2-6/13 ÷ 9/26-2/3

3. 2/9 + 1/2 ÷ 4/5 + 3/8

4. 10 ÷ 5/9 + 1/6 × 4

5. 1/2 ×2/5 + 9/10 ÷ 9/20

6. 5/9 × 3/10 + 2/7 ÷ 2/5

7. 1/2 + 1/4 × 4/5-1/8

8. 3/4 × 5/7 × 4/3-1/2

9. 23 -8/9×1/27÷1/27

10. 8×5/6 + 2/5÷4

11. 1/2 + 3/4×5/12×4/5

12. 8/9×3/4-3/8÷3/4

13. 5/8÷5/4＋3/ 23÷9/11

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

0.25×8.6×4

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

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 (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)

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) × 2.5

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 + (3-0.299 ÷ 0.23) x 1

2.(6.8-6.8 x 0.55) ÷ 8.5

3.0.12 x 4.8 ÷ 0.12 x 4.8

4.(3.2 x 1.5 + 2.5) ÷ 1.6 (2) 3.2 x ( 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 × (3.7-2.9) + 0.62]

13.12 × 6 ÷ (12-7.2) - 6

14.12 × 6 ÷ 7.2 - 6

15.33.02 - (148.4 - 90.85) ÷ 2.5 < /p>

High demand ah ！！！！！

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

< p>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 (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)

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)×2.5

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

Brother's age 7 years ago and sister's age 5 years from now are equal to the same age, and brother will be exactly 3 times his sister's age when he is ( )?

2. The first digit on the left side of a six-digit number is 1. If this digit 1 is moved to the far right, then the resulting six-digit number is three times the original number, find the number.

3. The summer camp is over, because of the large amount of luggage, Dongdong, Xisi and Nannan share a cab home. The car traveled 9 kilometers, East East first got off; another 9 kilometers, West West got off; another 9 kilometers, South South also got off. South-South paid the driver 54 yuan for the ride. How can these fares be reasonably apportioned? (Do not take into account the cab fare)

I. Fill in the numbers according to the pattern.

1)64, 48, 40, 36, 34, ( )

2)8, 15, 10, 13, 12, 11, ( )

3)1, 4, 5, 8, 9, ( ), 13, ( ), ( )

4)2, 4, 5, 10, 11, ( ), ( )

5)5, 9, 13, 17. 21, ( ), ( )

2. Equal difference series

1. In the equal difference series 3, 12, 21, 30, 39, 48, ... 912 is the first number?

2. Find the sum of all integers not divisible by 5 or 9 in the range 1 to 100

3. Split 210 into the sum of 7 natural numbers so that after the 7 numbers are arranged in a row from smallest to largest, the difference between two neighboring numbers is 5, so what is the 1st number and the 6th number?

4. Group all the odd numbers starting from 1, where the first number of each group is equal to the number of all the numbers in this group, e.g. (1), (3, 5, 7), (9, 11, 13, 15, 17, 19, 21, 23, 25), (27, 29, ......79), (81, ......), find the sum of all the numbers in group 5

Three, average problems

1.It is known that the average of 9 numbers is 72,after removing one number,the average of the remaining numbers is 78,the number removed is ______ .

2. a class of 40 students, mid-term math exam, there are two students absent for some reason, then the class average is 89 points, the absent students make-up exams each scored 99 points, the class average score in the mid-term exam is _______ .

3. the first five months of this year, Xiaoming average monthly savings of 4.2 yuan, from June he saved 6 yuan a month, so from which month Xiaoming's average savings more than 5 yuan?

4. A, B, C, D four numbers, each time to remove a number, will be the remaining under the average of the three numbers, so that the calculation of four times, to get the following four numbers.

23, 26, 30, 33

What is the average of the 4 numbers A, B, C and D?

5 4 numbers A, B, C, D. Remove one number at a time and average the remaining 3. This was done 4 times to get the following 4 numbers 23, 26, 30, 33 and the sum of the 4 numbers A, B, C, D is .

Four, addition, subtraction, multiplication and division of simple operations

1) 100-98+96-94+92-90+......+8-6+4-2= ( )

2) 1976+1977+...... 2000-1975-1976-......-1999=( )

3) 26×99 =( )

4) 67×12+67×35+67×52+67=( )

5) (14+28+39)×(28+39+15)-( 14+28+39+15) x (28+39)

2. Fill nine consecutive natural numbers into nine spaces in 3 rows and 3 columns so that the sum of the three numbers in each horizontal row and in each vertical column is equal to 60.

3. Fill nine consecutive odd numbers starting from 1 into nine spaces in 3 rows and 3 columns so that the sum of the three numbers in each horizontal row, in each vertical column and in both diagonals is The sum of the three numbers in each horizontal row, each vertical column, and on both diagonals is equal.

4 Prepare a third-order phantom cube using the nine numbers from 1 to 9, writing out all possible outcomes. By phantom square we mean that each square of a square table of squares is filled with a different number so that the sum of the numbers in each row, column, and on the two diagonals is equal; and by order we mean the number of squares contained in each row and column.

Six, and difference times the problem

1. orchard a **** planted 340 peach trees and apricot trees, of which the number of peach trees than apricot trees 3 times more than 20, how many of the two kinds of trees?

2. A rectangle with a perimeter of 30 centimeters and a length twice as long as the width, find the area of the rectangle.

3. Two numbers, A and B, if the number of A plus 320 is equal to the number of B. If the number of B plus 460 is equal to the number of B, how many trees of each kind are there? If the number B plus 460 is equal to 3 times the number A. What is each of the two numbers?

4. There are two pieces of cloth of the same length, the first sold 25 meters, the second sold 14 meters, the rest of the cloth the second is two times the first, find each piece of cloth original how many meters?

5. There are peach trees and pear trees in the orchard ****150 trees, peach trees than pear trees more than 20 trees, how many of each of the two kinds of fruit trees?

6. A, B two barrels of oil *** weight 30 kg, if the A barrel of 6 kg of oil poured into the B barrel, then the two barrels of oil weight is equal, ask A, B two barrels of the original how much oil?

Seven, the age problem

1. brothers this year and the age of 30 years old, when the older brother like the younger brother is now so old, the younger brother's age is exactly half of the older brother's age, the older brother this year, how old?

2. The sum of the ages of a mother and daughter is 64 years, and three times the age of the daughter is 8 years older than the mother.

3. Brother is 12 years older than Xiao Li this year, 8 years ago brother's age is 4 times the age of Xiao Li, how old is each of them this year?

4. Grandpa is 72 years old and his grandson is 12 years old. How many years later will grandpa be 5 times as old as his grandson? How many years ago was the grandfather 13 times as old as the grandson?

VIII. Hypothetical questions

1. 42 students to participate in tree planting, boys planted an average of 3 trees per person, girls planted an average of 2 trees per person, boys more than girls planted more than 56 trees. How many boys and girls were there?

2. A elementary school held a math competition,***15 questions, each do a question to get 8 points, each do a question wrong deduct 4 points, Xiaoming *** scored 72 points, he did how many questions?

3. A test paper has 25 questions, answer a question correctly 4 points, wrong or do not answer are deducted 1 point, a student **** 60 points, he answered how many questions correctly?

4. Xiaohua answered the math judgment questions, 4 points for a correct answer, 4 points for a wrong answer, she answered 20 judgment questions, the result was only 56 points, how many questions she answered wrong?

5. Yucai Elementary School held a math competition in fifth grade,*** 10 questions, 8 points for each correct question, 5 points for a wrong deduction, Zhang Xiaoling finally scored 41 points, how many questions did she do right?

I. Calculation questions (If you can use a simple method to calculate, use a simple algorithm. 4 points per question,***12 points.)

2.1994+199.4+19.94+1.994

II. Fill in the blanks (5 points for each of questions 1-7, 7 points for each of questions 8-10, ****56 points.)

1. The Pupil Mathematics Journal is published once a week on Fridays. issue 1 of October 1994 was published on October 7, and issue 1 of January 1995 should be published on January ____.

2. In the equivariant series 6, 13, 20, 27, ..., the ____th number counted from left to right (Shǔ) is 1994.

3. If you write the number 6 after the digit number of a number, you get a new number that is 6000 more than the original number.The original number is ____.

4. There are 7 different primes and their sum is 60, the smallest of these primes is ____.

5. In the diagram on the right, *** there are ____ trapezoids.

6. In the equation "(□□ - 7×□) ÷ 16 = 2", "□" represents the same number, which is ____.

7. Figures 1 and 2 are made of identical small squares, and the perimeter of Figure 1 is 22 centimeters, so the perimeter of Figure 2 is ____ centimeters.

8.There are two fractions A and B:

When these two fractions are compared, ____ is greater than ____.

9. Let a△b = a × a - 2 × b. Then, 5△6 = ____ and (5△2)△3 = ____.

10. There are 25 each of red chopsticks, black chopsticks, white chopsticks, yellow chopsticks, purple chopsticks and flower chopsticks of exactly the same shape and length. At least ____ chopsticks should be touched in the dark to ensure that there are at least 8 pairs of chopsticks touched (every two flower chopsticks or two chopsticks of the same color is a pair).

III. SHORT ANSWER QUESTIONS (8 points)

If you take any 26 numbers out of the 50 numbers 1, 2, 3, 4, ..., 49, 50, then at least two of these 26 numbers are mutually prime. Q: Why is this?

Fourth, the application of the problem (write a column answer process. Each question 6 points, *** 24 points.)

1. Ming leaves home at 6:50 every morning and arrives at school at 7:20. His teacher asks him to arrive at school 6 minutes earlier tomorrow. If Ming still leaves home at 6:50 tomorrow morning, he will have to walk 25 meters more per minute than usual to arrive at school on time as requested by his teacher. Q: How far is Ming's house from the school?

2. A daughter is 12 years old this year (1994). Mom says to her daughter, "When you're my age, I'll be 60!" Q: What year was it when mom was 12?

3. Ding Ding and Ning Ning each have a box with chess pieces in it, and the pieces in the two boxes are one ****

VII.AGE PROBLEMS

1. The sum of the ages of the two brothers this year is 30, and when the older brother is as old as the younger brother is now, the younger brother's age will be exactly half of the older brother's age, and the older brother's age will be how old is the older brother?

2. The sum of the ages of mother and daughter is 64 years. 3 times the age of the daughter is 8 years older than the mother.

3. Brother is 12 years older than Xiao Li this year, 8 years ago brother's age is 4 times the age of Xiao Li, how old is each of them this year?

4. Grandpa is 72 years old and his grandson is 12 years old. How many years later will grandpa be 5 times as old as his grandson? How many years ago was the grandfather 13 times the age of the grandson?

29. Master and apprentice two people on the first day *** processing parts 225, the second day of the new process, the master processed parts than the first day increased by 24%, the apprentice increased by 45%, two people *** processing parts 300, the next day the master processed how many parts? How many parts did the apprentice process?

30. Endeavour Primary School organized the sixth grade students to the Hundred Flowers Mountain camping exercise, the trip increased by 2 kilometers per day. It took 4 days to get there and 3 days to get back. How many kilometers is the school from Hundred Flowers Mountain?

Primary school math application problems comprehensive training (04)

31. a place to collect the standard of electricity is: monthly electricity consumption does not exceed 50 degrees, 50 cents per degree; if more than 50 degrees, the excess part of the charge of 80 cents per degree. Monthly user A than user B to pay 3 yuan 3 cents more electricity, this month, A, B each used how many degrees of electricity?

32. Master Wang plans to use 2 hours to process a batch of parts, when there are still 160 parts left, the machine malfunctioned, the efficiency is 1/5 lower than the original, the result is more than the original plan to delay the completion of the task in 20 minutes, how many parts of this batch?

33. Mom gave Hong Hong some money to buy New Year's cards, there are A, B, C three kinds of New Year's cards, A kind of card 1.20 yuan each. There are three kinds of cards: A, B and C. A card costs 1.20 dollars each. With this money, it takes 8 more cards to buy A than B, and 6 more cards to buy B than C. How much money did mom give Hong Hong? How much money did mom give Hong Hong? How much is each card of type B?

34. An old man has five sons and three houses, and before he dies, he makes a will giving one house to each of his three sons. As compensation, the three sons who got the house each put up 1200 yuan, equally divided to the two sons who did not get the house. Everyone says this distribution is fair and reasonable, so the value of each house is how many dollars?

35. Xiaoming and Xiaoyan both have less than 20 picture books, if Xiaoming gives Xiaoyan A book, Xiaoming's picture book is twice as much as Xiaoyan's; if Xiaoyan gives Xiaoming A book, Xiaoming's picture book is three times as much as Xiaoyan's. How many books do Xiaoming and Xiaoyan have each? How many picture books do Xiaoming and Xiaoyan have?