数学题!速度

简便运算。1、5\12×11+5\122、8又5\9÷10\27+2又4\9×2.73、99×99\1004、20×1.6+16×55、89×37+110×3.76、73... 简便运算。
1、5\12×11+5\12 2、8又5\9÷10\27+2又4\9×2.7 3、99×99\100

4、20×1.6+16×5 5、89×37+110×3.7 6、73×11\12

7、63.5×0.54+3.65×5.4 8、37\49×31+18\49×37 9、65×63\64

10、3又1\2×125%+1又1\4×2.7+3.8÷4\5 11、3\8×7.9+3\8×10%

12、21×1\8+48×12.55+11×1\8 13、0.78×101 14、30×1\13+9\13+10÷13

15、57×55\56+1\56
要脱式计算!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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楼主您好,很高兴为您回答。
1、5\12×11+5\12=55\12+5\12=60/12=5
2、8又5\9÷10\27+2又4\9×2.7=29.7
3、99×99\100= 98.01
4、20×1.6+16×5=112=2*16+16*5
5、89×37+110×3.7 = 3700 =89*37+11*37
6、73×11\12=803/12
7、63.5×0.54+3.65×5.4= 54=63.5*0.54+36.5*0.54=100*0.54
8、37\49×31+18\49×37=37=37/49*(31+18)
9、65×63\64=64又36/64=(64+1)*(64-1)/64=(64平方-1)/64
10、3又1\2×125%+1又1\4×2.7+3.8÷4\5=25/2=35/8+27/8+38/8=100/8
11、3\8×7.9+3\8×10%=3=3/8*(7.9+0.1)
12、21×1\8+48×12.55+11×1\8=606.4=21/8+11/8+48*12.55=4+48*12.55
13、0.78×101= 78.78 =0.78*(100+1)=78+0.78
14、30×1\13+9\13+10÷13=49/13=30/13+9/13+10/13
15、57×55\56+1\56=56=(56+1)*(56-1)/56+1/56=56平方-1/56+1/56=56平方/56
百度知道爱好者虔诚为您解答,望采纳,谢谢,祝您在2011年里学习进步。如果想要过程,可以告诉我,我在给你补充
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都是一些提公因式的题,比较简单.我用手机上的,在这里举个例子就好.比如第九题,可将六十五换成六十四加一,分别乘,.其实简便算法主要是靠参悟,没什么固定的方法
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一、脱式计算
(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、用梯等式计算
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、能简便的要简便算
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÷0.4

7.2×0.2+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
下面各题怎样算简便就怎样算。

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÷0.4

7.2×0.2+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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