1樓：新野旁觀者
34×3.535-3.5×34.34
=34×3.5×1.01-3.5×34×1.01=08+89+899+8999+89999=9+90+900+9000+90000-5=99999-5
=99994
0.67×2.1+0.
018×21+8.5×0.79=0.
67×2.1+0.18×2.
1+8.5×0.79=(0.
67+0.18)×2.1+8.
5×0.79=0.85×2.
1+0.85×7.9
=0.85×(2.1+7.9)
=0.85×10
=8.5
22222.2×9.99999
=22222.2×(10-0.00001)=222222-0.222222
=222221.777778
1997×19961996-1996×19971997=1997×1996×10001-1996×1997×10001=00.02+0.04+0.
06+0.08+……+19.94+19.
96+19.98
=(0.02+19.98)×999÷2
=10×999
=9990
99999×77778+33333×66666=99999×77778+99999×22222=99999×(77778+22222)
=99999×100000
=9999900000
(4又5/6-3又3/4)/(3/14+2/7)=13/12÷1/2
=13/6
=2又1/6
(4.8/1又4/5+3又1/2+7又1/3)*4/9=(2又2/3+7又1/3+3.5)*4/9=(10+3.5)*4/9
=13.5*4/9
=617.2/【(3又2/5-1.25)*2/3】=17.2/【2.15*2/3】
=17.2÷43/3
=1.2
5*5又1/5
=5*5+5*1/5
=25+1
=26(5又2/5-1.8)/[(1.15+13/20)*1又2/3]
=3.6/[1.8*5/3]
=3.6/3
=1.2
3又5/8*5又1/5+5又1/5*6又3/8=5.2*(3又5/8+6又3/8)
=5.2*10
=52[3/4-7/8/(5/6+4/5)]*28=[3/4-7/8÷49/30]*28
=[3/4-15/28]*28
=3/4*28-15/28*28
=21-15
=6(1.25*4/5-0.76)/(1又3/8+1又1/40)=(1-0.76)/2.4
=0.24/2.4
=0.1
[(0.2+1/3)*4.5]/(8又1/20-6.45)=8/15*4.5/1.6
=2.4/1.6
=1.5
x+3又2/3=5
x*9又3/4=7又1/11 x/2/5=106又2/3-x=4.25 6.4*1.
7+6又2/5*8.3(4又6/7+1.75)/1又11/14+3又5/62.
16-7x=0.06
1/2x-0.5=5又1/2
8.16-1.26/0.3*1.5
=8.16-4.2*1.5
=8.16-6.3
=1.86
8.4*[(1.2+3又1/3)/3.4-1/2]=8.4*[68/16/3.4-1/2]
=8.4*[5/4-1/2]
=8.4*3/4
=6.3
5.8:x=3又1/2:7
3.5x=7*5.8
x=7/3.5*5.8
x=2*5.8
x=11.6
3/10*55-4x=14.5
16.5-4x=14.5
4x=2
x=0.2
19.38-4又7/8-5又1/8
=1.938-(4又7/8+5又1/8)
=19.38-10
=9.38
13又7/13-(6又3/5+3又7/13)=13又7/13-3又7/13-6又3/5=10-6又3/5
=3.4
1又3/4+[2又3/14-(2又3/14-1.875)]/2又1/12
=1又3/4-15/8*12/25
=1又3/4-9/10
=0.85
(9.4-8又2/5)/[(1.1+1/15)*1又7/18]=1/[7/6*25/18]
=1÷175/108
=108/175
2樓：佘樂悅
（1）2.64×1.7-2.64×0.7
=2.64×（1.7-0.7）
=2.64×1
=2.64
（2）31.5×1.07-3.15×0.7=3.15×10.7-3.15×0.7
=3.15×（10.7-0.7）
=3.15×10
=31.5
（3）2.7×5.7-2.7+5.3×2.7=2.7×(5.7-1+5.3）
=2.7×10
=27（4）0.625÷0.125×0.8=（0.625×0.8）×8÷（0.128×8）=0.5×8÷1
=4（5）18.6×6.1+3.9×18.6=18.6×（6.1+3.9）
=18.6×10
=186
（6）1.3579+3.5791+5.7913+7.9135+9.1357
=（1+3+5+7+9）×1.1111
=25×1.1111
=27.7775
（7）52.5x2.9+5.45
=5.25x29+5.25+0.2
=5.25×（29+1）+0.2
=5.25×30+0.2
=157.5+0.3
=157.7
（8）0.92x15+0.08x15
=（0.92+0.08）×15
=1×15
=15（9）0.72×1.25×2.5
=0.9×（0.8×1.25）×2.5
=0.9×1×2.5
=2.25
（10）400.6x7-2003x0.4
=200.3x14-200.3x4
=200.3×（14-4）
=200.3×10
=2003
六年級上冊數學簡便計算及答案
3樓：楓葉
2.8×4/5+8.2×4/5-4/5
＝（2.8+8.2-1）×4/5
＝10×4/5
＝8你好，本題已解答,如果滿意
請點右下角「採納答案」。
4樓：瀛洲煙雨
0.4×
125×25×0.8
=(0.4×25)×(125×0.8)
=10×100=1000
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.
78.3×(6.3+3.7)
=8.3×10
=831.24+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
5樓：5皮特
（1）2.64×1.7-2.64×0.7
=2.64×（1.7-0.7）
=2.64×1
=2.64
（2）31.5×1.07-3.15×0.7=3.15×10.7-3.15×0.7
=3.15×（10.7-0.7）
=3.15×10
=31.5
（3）2.7×5.7-2.7+5.3×2.7=2.7×(5.7-1+5.3）
=2.7×10
=27（4）0.625÷0.125×0.8=（0.625×0.8）×8÷（0.128×8）=0.5×8÷1
=4（5）18.6×6.1+3.9×18.6=18.6×（6.1+3.9）
=18.6×10
=186
（6）1.3579+3.5791+5.7913+7.9135+9.1357
=（1+3+5+7+9）×1.1111
=25×1.1111
=27.7775
（7）52.5x2.9+5.45
=5.25x29+5.25+0.2
=5.25×（29+1）+0.2
=5.25×30+0.2
=157.5+0.3
=157.7
（8）0.92x15+0.08x15
=（0.92+0.08）×15
=1×15
=15（9）0.72×1.25×2.5
=0.9×（0.8×1.25）×2.5
=0.9×1×2.5
=2.25
（10）400.6x7-2003x0.4
=200.3x14-200.3x4
=200.3×（14-4）
=200.3×10
=2003
6樓：李洪濤
1.25×32
=1.25 ×8×4
= 10×4=40
7樓：泉赫澹臺依波
34×3.535-3.5×34.34
=34×3.5×1.01-3.5×34×1.01=08+89+899+8999+89999=9+90+900+9000+90000-5=99999-5
=99994
0.67×2.1+0.
018×21+8.5×0.79=0.
67×2.1+0.18×2.
1+8.5×0.79=(0.
67+0.18)×2.1+8.
5×0.79=0.85×2.
1+0.85×7.9
=0.85×(2.1+7.9)
=0.85×10
=8.5
22222.2×9.99999
=22222.2×(10-0.00001)=222222-0.222222
=222221.777778
1997×19961996-1996×19971997=1997×1996×10001-1996×1997×10001=00.02+0.04+0.
06+0.08+……+19.94+19.
96+19.98
=(0.02+19.98)×999÷2
=10×999
=9990
99999×77778+33333×66666=99999×77778+99999×22222=99999×(77778+22222)
=99999×100000
=9999900000
(4又5/6-3又3/4)/(3/14+2/7)=13/12÷1/2
=13/6
=2又1/6
(4.8/1又4/5+3又1/2+7又1/3)*4/9=(2又2/3+7又1/3+3.5)*4/9=(10+3.5)*4/9
=13.5*4/9
=617.2/【(3又2/5-1.25)*2/3】=17.2/【2.15*2/3】
=17.2÷43/3
=1.2
5*5又1/5
=5*5+5*1/5
=25+1
=26(5又2/5-1.8)/[(1.15+13/20)*1又2/3]
=3.6/[1.8*5/3]
=3.6/3
=1.2
3又5/8*5又1/5+5又1/5*6又3/8=5.2*(3又5/8+6又3/8)
=5.2*10
=52[3/4-7/8/(5/6+4/5)]*28=[3/4-7/8÷49/30]*28
=[3/4-15/28]*28
=3/4*28-15/28*28
=21-15
=6(1.25*4/5-0.76)/(1又3/8+1又1/40)=(1-0.76)/2.4
=0.24/2.4
=0.1
[(0.2+1/3)*4.5]/(8又1/20-6.45)=8/15*4.5/1.6
=2.4/1.6
=1.5
x+3又2/3=5
x*9又3/4=7又1/11
x/2/5=10
6又2/3-x=4.25
6.4*1.7+6又2/5*8.3
(4又6/7+1.75)/1又11/14+3又5/62.16-7x=0.06
1/2x-0.5=5又1/2
8.16-1.26/0.3*1.5
=8.16-4.2*1.5
=8.16-6.3
=1.86
8.4*[(1.2+3又1/3)/3.4-1/2]=8.4*[68/16/3.4-1/2]
=8.4*[5/4-1/2]
=8.4*3/4
=6.3
5.8:x=3又1/2:7
3.5x=7*5.8
x=7/3.5*5.8
x=2*5.8
x=11.6
3/10*55-4x=14.5
16.5-4x=14.5
4x=2
x=0.2
19.38-4又7/8-5又1/8
=1.938-(4又7/8+5又1/8)
=19.38-10
=9.38
13又7/13-(6又3/5+3又7/13)=13又7/13-3又7/13-6又3/5=10-6又3/5
=3.4
1又3/4+[2又3/14-(2又3/14-1.875)]/2又1/12
=1又3/4-15/8*12/25
=1又3/4-9/10
=0.85
(9.4-8又2/5)/[(1.1+1/15)*1又7/18]=1/[7/6*25/18]
=1÷175/108
=108/175
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