100 preguntas de cálculo matemático en el volumen 2 para el grado 7 (edición de la Universidad Normal de Beijing) preferiblemente con respuestas

1. 3/7 × 49/9 - 4/3

2. × 5/6 – 2/9 × 3

4. 8× 5/4 + 1/4

5. p>

p>

6. 4/7 × 5/9 + 3/7 × 5/9

7. /p>

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

9. 5/6 + 5/6

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. /p>

14. 5/6 – 5/6

15. 9/7 – (2/7 – 10/21)

5/. 9 × 18 – 14 × 2/7

17 4/5 × 25/16 + 2/3 × 3/4

18. 6×12/15

19.17/32 – 3/4×9/24

20. 21. 5/7 × 3/25 + 3/7

22 3/14 ×× 2/3 + 1/6

23. + 5/6

24. 9/22 + 1/11 ÷ 1/2

25. >26. 45 × 2/3 + 1/3 × 15

27 7/19 + 12/19 × 5/6

28. ÷ 2/3

29. 8/7 × 21/16 + 1/2

30. >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 42580 -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. p>

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

Hay

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

0,8×[7,9-(2+5)]

469×12+1492

405×(3213-3189)

3,416÷(0,016× 35 )

0,8×[(10-6,76)÷1,2]