80道脱式计算 答案过程资料.docx
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80道脱式计算 答案过程资料.docx
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80道脱式计算答案过程资料
80道脱式计算答案过程
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
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