1. 0.4×125×25×0.8 =（0.4×25）×（125×0.8）=10×100=1000
2. 1.25×（8+10）=1.25×8+1.25×10 =10+12.5=22.5
3.9123-（123+8.8）=9123-123-8.8=9000-8.8=8991.2
4.1.24×8.3+8.3×1.76 =8.3×（1.24+1.76） =8.3×3=24.9
5.9999×1001
=9999×（1000+1）
=9999×1000+9999×1
=10008999
6. 14.8×6.3-6.3×6.5＋8.3×3.7
=（14.8-6.5）×6.3＋8.3×3.7
=8.3×6.3+8.3×3.7
=8.3×（6.3＋3.7）
=8.3×10
=83
7. 1.24+0.78+8.76
=（1.24+8.76）+0.78
=10+0.78
=10.78
8. 933-157-43 =933-（157+43） =933-200 =733
9. 4821-998
=4821-1000+22=3823
10. 32×125×25
=4×8×125×25
=（4×25）×（8×125）
=100×1000
=100000 9048÷26
=（2600+2600+2600+1248）÷26
=2600÷26+2600÷26+2600÷26+1248÷26
=100+100+100+48
=348
11. 2881÷ 43
=（1290+1591）÷ 43
=1290÷43+1591÷43
=30+37 =67 3.2×42.3×3.75-12.5×0.423×16
=3.2×42.3×3.75-1.25×42.3×1.6
=42.3×(3.2×3.75-1.25×1.6)
=42.3×(4×0.8×3.75-1.25×4×0.4)
=42.3×(4×0.4×2×3.75-1.25×4×0.4)
=42.3×(4x0.4x7.5-1.25x4x0.4)
=42.3×[4×0.4×(7.5-1.25)]
=42.3×[4×0.4×6.25]
=42.3×(4×2.5) =423
12. 1.8+18÷1.5-0.5×0.3 =1.8+12-0.15=13.8-0.15 =13.65
13. 6.5×8+3.5×8-47 =52+28-47 =80-47 =33 (80-9.8)×5分之2-1.32 =70.2X2/5-1.32=28.08-1.32 =26.76
14. 8×7分之4÷[1÷(3.2-2.95)] =8×4/7÷[1÷0.25]=8×4/7÷4 =8/7
15. 2700×（506－499）÷900 =2700×7÷900 =18900÷900 =21
16. 33.02－（148.4－90.85）÷2.5=33.02－57.55÷2.3=33.02－23.02=10
17. （1÷1－1）÷5.1 =（1－1）÷5.1 =0÷5.1 =0
18. 18.1＋（3－0.299÷0.23）×1=18.1＋1.7×1 =18.1＋1.7 =19.8
19. 9000÷72×(1.25×0.7×8)=9000÷72×7=125×7=875
20. 61-(1.25+2.5×0.7)=61-3=58
21. [(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=13.05
22. 5.4÷1.8+240×1.5=3+360=363
23. 9000÷72×(1.25×0.7×8）=9000÷72×7=125×7=875
24. 61-(1.25+2.5×0.7)=61-3=58
25. [(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=3.05
26. 408－12×24= 408 - 288= 120
27. （46＋28）×60= 74 x 60= 4440
28. 42×50－17 = 2100- 17 = 2083
29. 32＋105÷5 = 32 + 21= 53
30. 420×（327－238） = 420 x 89 = 37380
31. (4121+2389)÷7 = 6510 ÷7 = 930
32. 3.416÷（0.016×35） = 3.416 ÷0.56 = 6.1
33. 0.8×[(10－6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16
34. 5.67×0.2-0.62 = 1.134-0.62 = 0.514
35.0.4×0.7×0.25 = 0.4 x 0.2 5 x 0.7 = 0.1 x 0.7 = 0.07
36. 0.78+5.436+1 = 6.216 +1 = 7.216
37. 30.8÷[14－(9.85＋1.07)] = 30.8 ÷ (14 - 10.92) = 30.8÷3.08 = 10
38. [60－(9.5＋28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 120
39. 2.881÷0.43－0.24×3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
40. 20×[(2.44－1.8)÷0.4＋0.15] = 20x (0.64 ÷0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 35
41. 28-(3.4+1.25×2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6
42. 2.55×7.1+2.45×7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5
43. 0.8×〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2
44.（31.8+3.2×4）÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.92
45. 31.5×4÷(6+3) = 126 ÷ 9 = 14
46. 2÷2.5+2.5÷2 = 0.8 + 1.25 =2.05
47. 194－64.8÷1.8×0.9 = 194 -36 x0.9 = 194-32.4 = 161.65180－705×6 = 5180 - 4230=950
48. 24÷2.4－2.5×0.8 =10 -2=8
49. 405×(3213-3189) =405x24 = 9720
59. 125×(97-81) =125x16 =2000
60. 6942+480÷3 = 6942 + 160 = 6782
61. 20+80÷4-20 = 20 + 20 -20 = 40 -20 = 20
62. 100÷（32-30）×0 = 100 ÷2 x0= 50 x0 = 0
63. 25×4-12×5 = 100 - 60 = 40
64. 70×〔（42-42）÷18〕=70 x (0÷18) = 70x0 = 0
65. 75×65+75×35 = 75 x (65 +35) = 75x100 = 7500
66. 6-1.6÷4= 6- 0.4 = 5.6
67. 5.38+7.85-5.37= 13.23 - 5.37=7.86
68. 7.2÷0.8-1.2×5=9 - 6 =3
69. 6-1.19×3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2
70. 6.5×（4.8-1.2×4）= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0
71. 0.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9
72. 10.15-10.75×0.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.15
73. 5.8×（3.87-0.13）+4.2×3.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.4
74. 32.52-（6+9.728÷3.2）×2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97
75.（136+64）×（65-345÷23）= 200x(65-15) = 200x 50=10000
76. 0.4×125×25×0.8 =(0.4×25)×(125×0.8)=10×100=1000
77. 1.25×(8+10) =1.25×8+1.25×10=10+12.5=22.5
78. 9123-(123+8.8) =9123-123-8.8=9000-8.8=8991.2
79. 1.24×8.3+8.3×1.76 =8.3×(1.24+1.76)=8.3×3=24.9
80. 9999×1001 =9999×(1000+1)=9999×1000+9999×1 =10008999
81. 14.8×6.3-6.3×6.5+8.3×3.7 =(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7
82. 8.3×(6.3+3.7) =8.3×10 =83
83. 1.24+0.78+8.76 =(1.24+8.76)+0.78 =10+0.78 =10.78
84. 933-157-43 =933-(157+43)=933-200=733
85. 4821-998 =4821-1000+2=3823
86. I32×125×25 =4×8×125×25 =(4×25)×(8×125)=100×1000 =100000
87. 9048÷268
=(2600+2600+2600+1248)÷26
=2600÷26+2600÷26+2600÷26+1248÷269
=100+100+100+48
=348
88. 2881÷ 43 =(1290+1591)÷ 434=1290÷43+1591÷43=30+37
89. 1.8+18÷1.5-0.5×0.3 =1.8+12-0.15=13.8-0.15=13.65
90. 6.5×8+3.5×8-47 =52+28-47=80-47
91. (80-9.8)×5分之2-1.32 =70.2X2/5-1.32=28.08-1.32=26.76
92. 8×7分之4÷[1÷(3.2-2.95)]=8×4/7÷[1÷0.25]=8×4/7÷4=8/7
93. 2700×(506-499)÷900 =2700×7÷900 =18900÷900 =21
94. 33.02-(148.4-90.85)÷2.5=33.02-57.55÷2.5=33.02-23.02 =10
95. (1÷1-1)÷5.1 =(1-1)÷5.1 =0÷5.1 =0
96. 18.1+(3-0.299÷0.23)×1=18.1+1.7×1 =18.1+1.7 =19.8
97. 4.1/27+505/2727+131313/272727 =1/27+5*101/(27*101)+13*10101/(27*10101)
=1/27+5/27+13/27=19/27
98. 6.5×8+3.5×8-47 =52+28-47=80-47
99. (80-9.8)×5分之2-1.32 =70.2X2/5-1.32=28.08-1.32=26.76
100. 1.8+18÷1.5-0.5×0.3 =1.8+12-0.15=13.8-0.15=13.65
延展回答
脱式计算即递等式计算，把计算过程完整写出来的运算，也就是脱离横式的计算。
在计算混合运算时，通常是一步计算一个算式(逐步计算，等号不能写在原式上)，要写出每一步的过程。一般来说，等号要往前，不与第一行对齐。也就是离开原式计算。
(脱字念tuo)主要掌握的是记住要先算乘、除法，后算加、减法。在乘除法连续计算时中，要按从左往右的顺序依次计算。遇到括号，要首先计算括号内部。
在脱式过程中要按运算顺序划出运算顺序线，还要做到"三核对"，一要核对从书上把题抄到作业本上数字、符号是否抄对。二要核对从横式抄到草稿竖式的数字、符号是否抄对。三要核对把草稿竖式上的得数，抄到横式上是否抄对，小数点是否点对地方，有无遗漏。
1.6÷ 3/8 – 3/8 ÷6
=1/6x(3/8-3/8)
=1/6x0
=0
2.4/7 × 5/9 + 3/7 × 5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
3.5/2 -（ 3/2 + 4/5 ）
=5/2-3/2-4/5
=1-4/5
=1/5
4.6 ×（ 1/2 + 2/3 ）
=6x1/2+6x2/3
=3+4
=7
5.8 × 4/5 + 8 × 11/5
=8x(4/5+11/5)
=8x3
=24
6.31 × 5/6 – 5/6
=(31-1)x5/6
=30x5/6
=25
7.4/5 × 25/16 + 2/3 × 3/4
=5/4+1/2
=5/4+2/4
=7/4
8.101 × 1/5 – 1/5 × 21
=(101-21)x1/5
=80x1/5
=16
=75oo÷（25X4）
=75o0÷1OO
1.25×（8+10）
=1.25×8+1.25×10
=10+12.5=22.5
9123-（123+8.8）
=9123-123-8.8
=9000-8.8
=8991.2
1.24×8.3+8.3×1.76
=8.3×（1.24+1.76)
=8.3×3=24.9
9999×1001
=9999×（1000+1）
=9999×1000+9999×1
=10008999
14.8×6.3-6.3×6.5＋8.3×3.7
=（14.8-6.5）×6.3＋8.3×3.7
=8.3×6.3+8.3×3.7
8.3×（6.3＋3.7）
=8.3×10
=83
1.24+0.78+8.76
=（1.24+8.76）+0.78
=10+0.78
=10.78
933-157-43
=933-（157+43）
=933-200
=733
4821-998
=4821-1000+2
=3823
I32×125×25
=4×8×125×25
=（4×25）×（8×125）
=100×1000
=100000
9048÷268
=（2600+2600+2600+1248）÷26
=2600÷26+2600÷26+2600÷26+1248÷269
=100+100+100+48
=348
2881÷ 43
=（1290+1591）÷ 434
=1290÷43+1591÷43
=30+37
3.2×42.3×3.75-12.5×0.423×16
=3.2×42.3×3.75-1.25×42.3×1.6
=42.3×(3.2×3.75-1.25×1.6)
=42.3×(4×0.8×3.75-1.25×4×0.4)
=42.3×(4×0.4×2×3.75-1.25×4×0.4)
=42.3×(4x0.4x7.5-1.25x4x0.4)
=42.3×[4×0.4×(7.5-1.25)]
=42.3×[4×0.4×6.25]
=42.3×(4×2.5)
=4237
1.8+18÷1.5-0.5×0.3
=1.8+12-0.15
=13.8-0.15
=13.65
6.5×8+3.5×8-47
=52+28-47
=80-47
(80-9.8)×5分之2-1.32
=70.2X2/5-1.32
=28.08-1.32
=26.76
8×7分之4÷[1÷(3.2-2.95)]
=8×4/7÷[1÷0.25]
=8×4/7÷4
=8/7
2700×（506－499）÷900
=2700×7÷900
=18900÷900
=21
33.02－（148.4－90.85）÷2.5
=33.02－57.55÷2.5
=33.02－23.02
=10
（1÷1－1）÷5.1
=（1－1）÷5.1
=0÷5.1
=0
18.1＋（3－0.299÷0.23）×1
=18.1＋1.7×1
=18.1＋1.7
=19.8
[-18]+29+[-52]+60
= 19
[-3]+[-2]+[-1]+0+1+2
= -3
[-301]+125+301+[-75]
= 50
[-1]+[-1/2]+3/4+[-1/4]
= -1
[-7/2]+5/6+[-0.5]+4/5+19/6
= 1.25
[-26.54]+[-6.14]+18.54+6.14
= -8
1.125+[-17/5]+[-1/8]+[-0.6]
= -3
0.45×2.5＝1.125
0.8×1.25＝1
0.3×3.6＝1.08
0.3×0.3＝0.09
10×0.07＝ 0.7
0.92×0.4＝ 0.368
0.2×0.26＝0.052
0.14×4＝0.56
0.02×0.1＝0.002
1.2×0.3＝ 0.36
2.5×0.4＝1
2.4×5＝12
0.22×4＝ 0.88
3.25×0＝0
0.9－0.52＝ 0.38
3.99×1＝3.99
0×3.52＝ 0
12.5×8＝100
8÷10 = 0.8
10-1.8-7.2= 1
0.43+3.57= 4
2.5×4×12=144
0.9×0.8= 0.72
7.5x-3x = 4.5x
a+3a+7a== 11a
1.05×100= 105
1÷0.5= 2
0.96÷3= 0.32
0.56×100= 56
3.78×100= 378
4÷0.8 =5
3.215×100= 321.5
0.8×10= 8
4.08×100= 408
1.1×0.2 =0.22
0.6×0.8 = 0.48
3×0.9= 2.7
2.5×0.4= 1
0.16×5 ＝ 0.8
1.78＋2.2 = 3.98
1.2×0.5-0.4 = 0.2
0.7÷0.01 = 70
2.5×0.4 = 1
12－3.9= 8.1
1.25×8÷1.25 = 8
6.6÷0.66 = 10
5.37×0+4.63 =4.63
3.9＋2.03＝ 5.93
7.2＋2.8＝10
1.4×5= 7
3/5+(-2/3)
=9/15+(-10/15)
=-(10/15 -9/15)
=-1/15
1/2+(-2/3)+4/5+(-1/2)+(-1/3)
=[1/2+(-1/2)]+[(-2/3)+(-1/3)]+4/5
=0+(-1)+4/5
=-1/5
13/17-3.5-6+2.5+6+4/17
=[(13/17+4/17]+[(-3.5)+2.5]+[-6+6]
=1+(-1)+0
=0
(-3.8)+2.7+(-0.43)+1.3+(-0.2)
=[(-3.8)+(-0.2)]+[2.7+1.3]+(-0.43)
=(-4)+4+(-0.43)
=-0.43
5/6+(-3/4)
=10/12+(-9/12)
=10/12-9/12
=1/12
[(-57/8)+2.125]+[(-3.37)+(-2.63)]+[25/4+(-0.25)]
=[(-7.125)+2.125]-6+[6.25-0.25]
=(-5)+(-6)+6
=-5
(-32)-(+5)
=(-32)+(-5)
=-37
7.3-(-6.8)
=7.3+(+6.8)
=14.1
(-1/50-(-2/3)-(+0.48)-(+4/9)
=(-1/50)+(+2/3)+(-0.48)+(-4/9)
=-1/50+2/3-0.48-4/9
=-1/50-0.48+2/3-4/9
=(-0.02-0.48)+(6/9-4/9)
=-5/18
(-2)-(-25)
=(-2)+(+25)
=23
1/2*(-1/4)
=-(1/2*1/4)
=-1/8
(-1/2）*（-3/4）
=+（1/2*3/4）
=3/8
(-3)*5/6*(-3/5)*(-9/4)
=-3*5/6*3*5*9/4
=-27/8
(-0.25)*0.5*(-100)*4
=(-4*0.25)*[0.5*(-100)]
=-1*(-50)
=50
(-5)*10/3+2*10/3+(-6)*10/3
=(-5+2-6)*10/3
=-9*(3+1/3)
=-27-3
=-30
-13*2/3-0.34*2/7+1/3*(-13)-5/7*0.34
=[-13*2/3+1/3*(-13)]+(-0.34*2/7-5/7*0.34)
=-13*(2/3+1/3)+0.34*(-2/7-5/7)
=-13-0.34
=-13.34
(-3)÷（-7/4）*0.75*7/3÷3
=-3*（-4/7）*3/4*7/3*1/3
=3*4/7*3/4*7/3*1/3
=1
-3-【-5+（1-0.2*3/5）÷（-2）】
=-3-[-5+(1-3/25)÷（-2）]
=-3-[-5+22/25*(-1/2)]
=-3-(-5-11/25)
=-3+5又11/25=2又11/25
15÷（1/5-1/3）
=15÷（-2/15）
=-15*15/2
=-225/2
（-5/6）÷（-2/3）*（-3/2）
=（-5/6）*（-3/2）*（-3/2）
=-5/6*3/2*3/2
=-15/8
62×7.1+2.9
=440.2+2.9
=443.1
4.2×0.25
=（4+0.2）×0.25
=4×0.25+0.2×0.25
=1+0.05
=1.05
5.2×4.3+0.8×4.3
=（5.2+0.8）×4.3
=6×4.3
=25.8
8.5+1.5÷0.25×4
=8.5+6×4
=8.5+24
=32.5
0.25×0.8+2.5%
=0.2+2.5%
=0.225
32×125×2.5
=4×8×125×2.5
=8×125×（4×2.5）
=1000×10
=10000
94÷（6.84×8.5-31.46÷0.55）
=94÷（58.14-57.2）
=94÷0.94
=100
13÷0.4÷2.5
=13÷（0.4×2.5）
=13÷1
=13
1.25×2.5×0.8
=（1.25×0.8）×2.5
=1×2.5
=2.5
1.5×101-1.5
=1.5×（101-1）
=1.5×100
=150
4.8×101
=4.8×100+4.8×1
=480+4.8
=484.8
3.25×4.7-7.8
=15.275-7.8
=7.475
0.57+0.43×0.24
=0.57+0.1032
=0.6732
945÷5÷3
=189÷3
=63
152×3÷2
=456÷2
=228
43×12×6
=516×6
=3096
200+25×33
=200+825
=1025
（25+26）×48
=51×48
=2448
576-（290+107）
=576-397
=179
649+124-556
=773-556
=217
4.82-5.2÷0.8×0.6
=4.82-6.5×0.6
=4.82-3.9
=0.92
