120道数学题及答案 七年级上册
2个回答

98+998+9998+99998

=(100-2)+(1000-2)+(10000-2)+(10000-2) =100+1000+10000+10000-2-2-2-2

=111100-8 =111092

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. 5.38+7.85-5.37

46. 7.2÷0.8-1.2×5

47. 6.5×(4.8-1.2×4)

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.(136+64)×(65-345÷23)

52. 420+580-64×21÷28

53.(58+370)÷(64-45)

54. 6-1.19×3-0.43

55. 0.68×1.9+0.32×1.9

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

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

3. (1-1/4+8/9)/7/9

4 2/3+1/6/3/24+2/21

5 1*8/15*3/5

6 10-3/4/9/10-1/6

7 [(1/3+1/2)/5/6-1/3]/1/7

8 2/3/5+3/5/2+3/4

9 1/[(2-2/3/1/2)]*2/5

10 3^2*3.25678

11 3^3-5

12 4^2-34%

13 3.25-315%

14 7^3+445%

15 12+5268.32-2569

16 123+456-52*8

17 45%+6325

18 1/2+1/3+1/4

19 789+456-78

20 45%+54%-36%

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

0.12χ+1.8×0.9=7.2 (9-5χ)×0.3=1.02 6.4χ-χ=28+4.4

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

5.6×2.9

3.77×1.8

0.02×96

5.22×0.3

9.99×0.02

4.67×0.9

5×2.44

1.666×6.1

9.432×0.002

5.6×6.5 望采纳