初一數學計算題越多越好

時間 2022-02-24 13:15:16

1樓:柒瑾鈺

1-1/3[x-(1+x)/3]=x/2-1/2[2x-(10-7x)/3] 1-1/3[x-1/3+x/3]=x/2-1/2[2x-10/3+7x/3] 1-1/3[4x/3-1/3]=x/2-1/2[13x/3-10/3] 1-4x/9-1/9=x/2-13x/6+10/6 4x/9-x/2+13/6=10/6-4-1/9 8x/18-9x/18+39x/18=30/18-18/18-2/18 38x/18=18/10 x=10/18÷38/18 x=10/18×18/38 x=5/19(5x2-2x+3)+(3x2+5x+2) x2y +2xy2–y3 +3xy2 –4x2y-x3 3ab-4ab+8ab-7ab+ab=______. 7x-(5x-5y)-y=______. 23a3bc2-15ab2c+8abc-24a3bc2-8abc=______. -7x2+6x+13x2-4x-5x2=______. 2y+(-2y+5)-(3y+2)=______. 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 51.-5+58+13+90+78-(-56)+50 52.-7*2-57/(3 53.

(-7)*2/(1/3)+79/(3+6/4) 54.123+456+789+98/(-4) 55.369/33-(-54-31/15.

5) 56.39+ 57.9x8x7/5x(4+6) 58.

11x22/(4+12/2) 59.94+(-60)/10 (1)23+(-73) (2)(-84)+(-49) (3)7+(-2.04) (4)4.

23+(-7.57) (5)(-7/3)+(-7/6) (6)9/4+(-3/2) (7)3.75+(2.

25)+5/4 (8)-3.75+(+5/4)+(-1.5) (9)(-17/4)+(-10/3)+(+13/3)+(11/3) (10)(-1.

8)+(+0.2)+(-1.7)+(0.

1)+(+1.8)+(+1.4) (11)(+1.

3)- (+17/7) (12)(-2)- (+2/3) (13)| (-7.2)-(-6.3)+(1.

1)| (14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|) (15)(-2/199)*(-7/6-3/2+8/3) (16)4a)*(-3b)*(5c)*1/6 1)23+(-73) (2)(-84)+(-49) (3)7+(-2.04) (4)4.23+(-7.

57) (5)(-7/3)+(-7/6) (6)9/4+(-3/2) (7)3.75+(2.25)+5/4 (8)-3.

75+(+5/4)+(-1.5) (9)(-17/4)+(-10/3)+(+13/3)+(11/3) (10)(-1.8)+(+0.

2)+(-1.7)+(0.1)+(+1.

8)+(+1.4) (11)(+1.3)-(+17/7) (12)(-2)-(+2/3) (13)|(-7.

2)-(-6.3)+(1.1)| (14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|) (15)(-2/199)*(-7/6-3/2+8/3) (16)4a)*(-3b)*(5c)*1/6 還有50道題,不過沒有答案 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 51.

-5+58+13+90+78-(-56)+50 52.-7*2-57/(3 53.(-7)*2/(1/3)+79/(3+6/4) 54.

123+456+789+98/(-4) 55.369/33-(-54-31/15.5) 56.

39+ 57.9x8x7/5x(4+6) 58.11x22/(4+12/2) 59.

94+(-60)/10 1. a^3-2b^3+ab(2a-b) =a^3+2a^2b-2b^3-ab^2 =a^2(a+2b)-b^2(2b+a) =(a+2b)(a^2-b^2) =(a+2b)(a+b)(a-b) 2. (x^2+y^2)^2-4y(x^2+y^2)+4y^2 =(x^2+y^2-2y)^2 3.

(x^2+2x)^2+3(x^2+2x)+x^2+2x+3 =(x^2+2x)^2+4(x^2+2x)+3 =(x^2+2x+3)(x^2+2x+1) =(x^2+2x+3)(x+1)^2 4. (a+1)(a+2)+(2a+1)(a-2)-12 =a^2+3a+2+2a^2-3a-2-12 =3a^2-12 =3(a+2)(a-2) 5. x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2 =[x(y+z)-y(x-z)]^2 =(xz+yz)^2 =z^2(x+y)^2 6.

3(a+2)^2+28(a+2)-20 =[3(a+2)-2][(a+2)+10] =(3a+4)(a+12) 7. (a+b)^2-(b-c)^2+a^2-c^2 =(a+b)^2-c^2+a^2-(b-c)^2 =(a+b+c)(a+b-c)+(a+b-c)(a-b+c) =(a+b-c)(a+b+c+a-b+c) =2(a+b-c)(a+c) 8. x(x+1)(x^2+x-1)-2 =(x^2+x)(x^2+x-1)-2 =(x^2+x)^2-(x^2+x)-2 =(x^2+x-2)(x^2+x+1) =(x+2)(x-1)(x^2+x+1) 9x^2(x-1)^2-3(x^2-x)-56 =9x^2(x-1)^2-3x(x-1)-56 =[3x(x-1)-8][3x(x-1)+7] =(3x^2-3x-8)(3x^2-3x+7)

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