數學題!速度

2021-03-12 14:36:01 字數 9078 閱讀 8762

1樓:

都是一些提公因式的題,比較簡單.我用手機上的,在這裡舉個例子就好.比如第九題,可將六十五換成六十四加一,分別乘,.其實簡便演算法主要是靠參悟,沒什麼固定的方法

2樓:匿名使用者

一、脫式計算

(1)50+160÷40 (2)120-144÷18+35 (3)347+45×2-4160÷52

(4)(58+37)÷(64-9×5) (5)95÷(64-45) (6)178-145÷5×6+42

(7)812-700÷(9+31×11) ( 8)85+14×(14+208÷26)

(9)(284+16)×(512-8208÷18) (10)120-36×4÷18+35

(11)(58+37)÷(64-9×5) (12)(6.8-6.8×0.55)÷8.5

(13)0.12× 4.8÷0.12×4.8 (14)(3.2×1.5+2.5)÷1.6

(15)3.2×(1.5+2.

5)÷1.6 (16)6-1.6÷4 (17)7.

2÷0.8-1.2×5

(18)6.5×(4.8-1.2×4) (19)0.68×1.9+0.32×1.9

(20)10.15-10.75×0.4-5.7 (21)5.8×(3.87-0.13)+4.2×3.74

(22)32.52-(6+9.728÷3.2)×2. (23)(136+64)×(65-345÷23)

(24) 420+580-64×21÷28 (25)(58+370)÷(64-45)

二、用梯等式計算

⑴6.9+4.8+3.

1 ⑵ 0.456+6.22+3.

78 ⑶15.89+(6.75-5.

8)×6

⑷4.02+5.4+0.

98 ⑸5.17-1.8-3.

2 ⑹ 13.75-(3.75+6.

48)×6

⑺3.68+7.56-2.

68 ⑻7.85+2.34-0.

85+4.66 ⑼35.6-1.

8-15.6-7.2

⑽3.82+2.9+0.

18+9.1 ⑾9.6+4.

8-3.6 ⑿ 7.14-0.

53-2.47

⒀5.27+2.86-0.

66+1.63 ⒁13.35-4.

68+2.65 ⒂73.8-1.

64-13.8-5.36

⒃47.8-7.45+8.

8 ⒄0.398+0.36+3.

64 ⒅ 15.75+3.59-0.

59+14.25

⒆66.86-8.66-1.34 ⒇ 0.25×16.2×4 (1.25-0.125)×8

三、能簡便的要簡便算

⑴3.6×102 ⑵ 3.72×3.

5+6.28×3.5 ③36.

8-3.9-6.1

④15.6×13.1-15.6-15.6×2.1 ⑤ 4.8×7.8+78×0.52 ⑥ 32+4.9-0.9

4.8×100.1 ⑧56.

5×9.9+56.5 ⑨7.

09×10.8-0.8×7

⑽25.48-(9.4-0.

52) ⑾ 4.2÷3.5 ⑿ 320÷1.

25÷8

⒀18.76×9.9+18.

76 ⒁ 3.52÷2.5÷0.

4 ⒂ 3.9-4.1+6.

1-5.9

⒃5.6÷3.5 ⒄ 9.

6÷0.8÷0.4 ⒅ 4.

2×99+4.2

⒆17.8÷(1.78×4) ⒇ 0.

49÷1.4 1.25×2.

5×32 3.65×10.1

15.2÷0.25÷4 0.

89×100.1 146.5-(23+46.

5)3.83×4.56+3.

83×5.44 4.36×12.

5×8 9.7×99+9.7

27.5×3.7-7.

5×3.7 8.54÷2.

5÷0.4 0.65×101 3.

2×0.25×12.5

(45.9-32.7)÷8÷0.

125 3.14×0.68+31.

4×0.032 5.6÷1.

25÷0.8÷2.5÷0.

47.2×0.2+2.

4×1.4 8.9×1.

01 7.74×(2.8-1.

3)+1.5×2.2

3.9×2.7+3.

9×7.3 18-1.8÷0.

125÷0.8 12.7×9.

9+1.27

21×(9.3-3.7)-5.

6 15.02-6.8-1.

02 5.4×11-5.4

2.3×16+2.3×23+2.3 9.43-(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

101×0.87-0.91×87 10.7×16.1-15.1×10.7 0.79×199

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+7.65 1.57+0.245+7.43 6.02+3.6+1.98

0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.5+4.9-6.5

3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.5

3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 0.32×403

3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×36

12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×5

7.6×0.8+0.2×7.6 0.85×199 0.25×8.5×4

1.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.5

0.8×(4.3×1.25) 3.12+3.12×99 28.6×101-28.3

0.86×15.7-0.86×14.7 2.4×102 2.31×1.2×0.5

14-7.32-2.68 2.64+8.67+7.36+11.33 70÷28

(2.5-0.25)×0.4 9.16×1.5-0.5×9.16 3.6-3.6×0.5

63.4÷2.5÷0.4 4.9÷1.4 3.9÷(1.3×5)

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

0.35×1.25×2×0.8 32.4×0.9+0.1×32.4 15÷0.25

4.5÷1.8

1.18.1+(3-0.

299÷0.23)×12.(6.

8-6.8×0.55)÷8.

53.0.12× 4.

8÷0.12×4.84.

(3.2×1.5+2.

5)÷1.6 (2)3.2×(1.

5+2.5)÷1.65.

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.

98.10.15-10.

75×0.4-5.79.

5.8×(3.87-0.

13)+4.2×3.7410.

32.52-(6+9.728÷3.

2)×2.511.[(7.

1-5.6)×0.9-1.

15] ÷2.512.5.

4÷[2.6×(3.7-2.

9)+0.62]13.12×6÷(12-7.

2)-614.12×6÷7.2-615.

33.02-(148.4-90.

85)÷2.516.15-10.

75×0.4-5.717.

18.1+(3-0.299÷0.

23)×118.(6.8-6.

8×0.55)÷8.519.

0.12× 4.8÷0.

12×4.820.(3.

2×1.5+2.5)÷1.

621.3.2×6+(1.

5+2.5)÷1.622.

0.68×1.9+0.

32×1.923.10.

15-10.75×0.4-5.

724.5.8×(3.

87-0.13)+4.2×3.

7425.32.52-(6+9.

728÷3.2)×2.526.

[(7.1-5.6)×0.

9-1.15] ÷2.527.

5.4÷[2.6×(3.

7-2.9)+0.62]28.

12×6÷(12-7.2)-629.12×6÷7.

2-630.33.02-(148.

4-90.85)÷2.531.

(58+37)÷(64-9×5)32. (6.8-6.

8×0.55)÷8.533.

0.12× 4.8÷0.

12×4.834.(3.

2×1.5+2.5)÷1.

6 (2)3.2×(1.5+2.

5)÷1.635. 5.

38+7.85-5.3736.

7.2÷0.8-1.

2×537. 6.5×(4.

8-1.2×4)38. 10.

15-10.75×0.4-5.

739. 5.8×(3.

87-0.13)+4.2×3.

7440. 32.52-(6+9.

728÷3.2)×2.541.

(136+64)×(65-345÷23)42. 420+580-64×21÷2843.(58+370)÷(64-45)44.

6-1.19×3-0.4345.

0.68×1.9+0.

32×1.9

下面各題怎樣算簡便就怎樣算。

6.9+4.8+3.1 0.456+6.22+3.78 15.89+(6.75-5.89)

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

3.68+7.56-2.68 7.85+2.34-0.85+4.66 35.6-1.8-15.6-7.2

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.

8 0.398+0.36+3.

64 15.75+3.59-0.

59+14.25

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

3.6×102 3.72×3.5+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

4.8×100.1 56.5×9.9+56.5 7.09×10.8-0.8×7.09

25.48-(9.4-0.52) 4.2÷3.5 320÷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÷3.5 9.6÷0.8÷0.4 4.2×99+4.2

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

15.2÷0.25÷4 0.89×100.1 146.5-(23+46.5)

3.83×4.56+3.83×5.44 4.36×12.5×8 9.7×99+9.7

27.5×3.7-7.

5×3.7 8.54÷2.

5÷0.4 0.65×101 3.

2×0.25×12.5

(45.9-32.7)÷8÷0.

125 3.14×0.68+31.

4×0.032 5.6÷1.

25÷0.8÷2.5÷0.

47.2×0.2+2.4×1.4 8.9×1.01 7.74×(2.8-1.3)+1.5×2.26

3.9×2.7+3.9×7.3 18-1.8÷0.125÷0.8 12.7×9.9+1.27

21×(9.3-3.7)-5.6 15.02-6.8-1.02 5.4×11-5.4

2.3×16+2.3×23+2.3 9.43-(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

101×0.87-0.91×87 10.7×16.1-15.1×10.7 0.79×199

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+7.65 1.57+0.245+7.43 6.02+3.6+1.98

0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.5+4.9-6.5

3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.55

3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 0.32×403

3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×36

12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×4

7.6×0.8+0.2×7.6 0.85×199 0.25×8.5×4

1.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.35

0.8×(4.3×1.25) 3.12+3.12×99 28.6×101-28.6

0.86×15.7-0.86×14.7 2.4×102 2.31×1.2×0.5

14-7.32-2.68 2.64+8.67+7.36+11.33 70÷28

(2.5-0.25)×0.4 9.16×1.5-0.5×9.16 3.6-3.6×0.5

63.4÷2.5÷0.4 4.9÷1.4 3.9÷(1.3×5)

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

0.35×1.25×2×0.8 32.4×0.9+0.1×32.4 15÷0.25

4.5÷1.8 4.2÷3.5 930÷0.6÷5

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