小学1年级10道数学题~ 简便计算,有能力的来啊
1.52又11/25*79.45+159*47.56+79又11/20*52.442.5/9*193+4/9*1953.2001*20022002-2002*200120...
1.52又11/25*79.45+159*47.56+79又11/20*52.44
2.5/9*193+4/9*195
3.2001*20022002-2002*20012001
4.1.9+19.9+199.9+1999.9+19999.9
5.3901*99/(3901*198)*1110
6.10又3/8*18.88+18.88*0.625-188.8*1/10
7.2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
8.1/1*2+1/2*3+1/3*4+……+1/10*11
9.1/3+1/15+1/35+1/63+1/99
10.1又1/2-5/6+7/12+9/20+11/30-13/42+15/56
写完整点,我有的是分...(2000分)..好的加150 展开
2.5/9*193+4/9*195
3.2001*20022002-2002*20012001
4.1.9+19.9+199.9+1999.9+19999.9
5.3901*99/(3901*198)*1110
6.10又3/8*18.88+18.88*0.625-188.8*1/10
7.2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
8.1/1*2+1/2*3+1/3*4+……+1/10*11
9.1/3+1/15+1/35+1/63+1/99
10.1又1/2-5/6+7/12+9/20+11/30-13/42+15/56
写完整点,我有的是分...(2000分)..好的加150 展开
12个回答
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1、52又11/25*79.45+159*47.56+79又11/20*52.44
=52.44*79.45+159*47.56+79.55*52.44
=52.44*(79.45+79.55)+159*47.56
=52.44*159+159*47.56
=159*(52.44+47.56)
=159*100
=15900
2、5/9*193+4/9*195
=5/9*(195-2)+4/9*195
=5/9*195-5/9*2+4/9*195
=195*(5/9+4/9)-5/9*2
=195-10/9
=193又8/9
3.2001*20022002-2002*20012001
=2002*20022002-2002*20012001-20022002
=2002*(20022002-20012001)-20022002
=2002*10001-20022002
=2002*(10001-10001)
=0
4、1.9+19.9+199.9+1999.9+19999.9 =(2+20+200+2000+20000)-(0.1+0.1+0.1+0.1+0.1)=22221.5
5.3901*99/(3901*198)*1110
=(3901/3901)*(99/198)*1110
=1*(1/2)*1110
=555
6.10又3/8*18.88+18.88*0.625-188.8*1/10
=10.375*18.88+18.88*0.625-18.88
=18.88*(10.375+0.625-1)
=188.8
7.2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
=(2002+2001-2000-1999)+(1998+1997-1996-1995)+……+2+1
=4+4+4+……+2+1
=4*500+2+1
=2003
8.1/1*2+1/2*3+1/3*4+……+1/10*11
=(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)+(1/10-1/11)
=1-1/11
=10/11
9.1/3+1/15+1/35+1/63+1/99
=1/2*(1-1/3)+1/2*(1/3-1/5)+1/2*(1/5-1/7)+1/2*(1/7-1/9)+
1/2*(1/9-1/11)
=1/2*(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)
=1/2*10/11
=5/11
10、1又1/2-5/6+7/12+9/20+11/30-13/42+15/56
=(1+1/2)-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)
=1+1/2-1/2-1/3+1/3+1/4+1/4+1/5+1/5+1/6-1/6-1/7+1/7+1/8
=1+1/4+1/4+1/5+1/5+1/8
=2.025
=52.44*79.45+159*47.56+79.55*52.44
=52.44*(79.45+79.55)+159*47.56
=52.44*159+159*47.56
=159*(52.44+47.56)
=159*100
=15900
2、5/9*193+4/9*195
=5/9*(195-2)+4/9*195
=5/9*195-5/9*2+4/9*195
=195*(5/9+4/9)-5/9*2
=195-10/9
=193又8/9
3.2001*20022002-2002*20012001
=2002*20022002-2002*20012001-20022002
=2002*(20022002-20012001)-20022002
=2002*10001-20022002
=2002*(10001-10001)
=0
4、1.9+19.9+199.9+1999.9+19999.9 =(2+20+200+2000+20000)-(0.1+0.1+0.1+0.1+0.1)=22221.5
5.3901*99/(3901*198)*1110
=(3901/3901)*(99/198)*1110
=1*(1/2)*1110
=555
6.10又3/8*18.88+18.88*0.625-188.8*1/10
=10.375*18.88+18.88*0.625-18.88
=18.88*(10.375+0.625-1)
=188.8
7.2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
=(2002+2001-2000-1999)+(1998+1997-1996-1995)+……+2+1
=4+4+4+……+2+1
=4*500+2+1
=2003
8.1/1*2+1/2*3+1/3*4+……+1/10*11
=(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)+(1/10-1/11)
=1-1/11
=10/11
9.1/3+1/15+1/35+1/63+1/99
=1/2*(1-1/3)+1/2*(1/3-1/5)+1/2*(1/5-1/7)+1/2*(1/7-1/9)+
1/2*(1/9-1/11)
=1/2*(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)
=1/2*10/11
=5/11
10、1又1/2-5/6+7/12+9/20+11/30-13/42+15/56
=(1+1/2)-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)
=1+1/2-1/2-1/3+1/3+1/4+1/4+1/5+1/5+1/6-1/6-1/7+1/7+1/8
=1+1/4+1/4+1/5+1/5+1/8
=2.025
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1.52又11/25*79.45+159*47.56+79又11/20*52.44
=52.44*79.45+159*47.56+79.55*52.44
=52.44*(79.45+79.55)+159*47.56
=52.44*159+159*47.56
=159*(52.44+47.56)
=159*100
=15900
2.5/9*193+4/9*195
=
=52.44*79.45+159*47.56+79.55*52.44
=52.44*(79.45+79.55)+159*47.56
=52.44*159+159*47.56
=159*(52.44+47.56)
=159*100
=15900
2.5/9*193+4/9*195
=
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(3)=2002+2001-2000-1999+1998+1997-1996-1995+......+2+1
=(2002+2001-2000-1999)+(1998+1997-1996-1995)+......+2+1
=(2002-2)÷4*4+2+1
=2003
(4)=(2+20+200+2000+20000)-(0.1+0.1+0.1+0.1+0.1)=22221.5
50*2/10分=10分,给10分我
(5)3901*99/(3901*198)*1110
=3901*99*1110/3901/198
=1110*(3901/3901)*(99/198)
=1110*1*1/2
=555
(6)原式=10.375*18.88+18.88*0.625-18.88
=18.88*(10.375+0.625-1)
=18.88*10
=188.8
(8)公式:1/n*(n+1)=1/n-1/(n+1)
所以原式=(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)+(1/10-1/11)
=1-1/11
=10/11
(9)公式:1/n(n+r)=1/r*(1/n-1/n+r)
所以原式=1/(1*3)+1/(3*5)+1/(5*7)+1/(7*9)+1/(9*11)
=1/2(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)
=1/2*(1-1/11)
=1/2*10/11
=5/11
(10)1又1/2=1+1/2
5/6=1/2+1/3
7/12=1/3+1/4
9/20=1/4+1/5
11/30=1/5+1/6
13/42=1/6+1/7
15/56=1/7+1/8
所以原式=(1+1/2)-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)
=1+1/2-1/2-1/3+1/3+1/4+1/4+1/5+1/5+1/6-1/6-1/7+1/7+1/8
=1+1/4+1/4+1/5+1/5+1/8
=2.025
=(2002+2001-2000-1999)+(1998+1997-1996-1995)+......+2+1
=(2002-2)÷4*4+2+1
=2003
(4)=(2+20+200+2000+20000)-(0.1+0.1+0.1+0.1+0.1)=22221.5
50*2/10分=10分,给10分我
(5)3901*99/(3901*198)*1110
=3901*99*1110/3901/198
=1110*(3901/3901)*(99/198)
=1110*1*1/2
=555
(6)原式=10.375*18.88+18.88*0.625-18.88
=18.88*(10.375+0.625-1)
=18.88*10
=188.8
(8)公式:1/n*(n+1)=1/n-1/(n+1)
所以原式=(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)+(1/10-1/11)
=1-1/11
=10/11
(9)公式:1/n(n+r)=1/r*(1/n-1/n+r)
所以原式=1/(1*3)+1/(3*5)+1/(5*7)+1/(7*9)+1/(9*11)
=1/2(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)
=1/2*(1-1/11)
=1/2*10/11
=5/11
(10)1又1/2=1+1/2
5/6=1/2+1/3
7/12=1/3+1/4
9/20=1/4+1/5
11/30=1/5+1/6
13/42=1/6+1/7
15/56=1/7+1/8
所以原式=(1+1/2)-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)
=1+1/2-1/2-1/3+1/3+1/4+1/4+1/5+1/5+1/6-1/6-1/7+1/7+1/8
=1+1/4+1/4+1/5+1/5+1/8
=2.025
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(3)=2002+2001-2000-1999+1998+1997-1996-1995+......+2+1
=(2002+2001-2000-1999)+(1998+1997-1996-1995)+......+2+1
=(2002-2)÷4*4+2+1
=2003
(4)=(2+20+200+2000+20000)-(0.1+0.1+0.1+0.1+0.1)=22221.5
50*2/10分=10分,给10分我
=(2002+2001-2000-1999)+(1998+1997-1996-1995)+......+2+1
=(2002-2)÷4*4+2+1
=2003
(4)=(2+20+200+2000+20000)-(0.1+0.1+0.1+0.1+0.1)=22221.5
50*2/10分=10分,给10分我
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(5)3901*99/(3901*198)*1110
=3901*99*1110/3901/198
=1110*(3901/3901)*(99/198)
=1110*1*1/2
=555
(6)原式=10.375*18.88+18.88*0.625-18.88
=18.88*(10.375+0.625-1)
=18.88*10
=188.8
(8)公式:1/n*(n+1)=1/n-1/(n+1)
所以原式=(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)+(1/10-1/11)
=1-1/11
=10/11
(9)公式:1/n(n+r)=1/r*(1/n-1/n+r)
所以原式=1/(1*3)+1/(3*5)+1/(5*7)+1/(7*9)+1/(9*11)
=1/2(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)
=1/2*(1-1/11)
=1/2*10/11
=5/11
(10)1又1/2=1+1/2
5/6=1/2+1/3
7/12=1/3+1/4
9/20=1/4+1/5
11/30=1/5+1/6
13/42=1/6+1/7
15/56=1/7+1/8
所以原式=(1+1/2)-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)
=1+1/2-1/2-1/3+1/3+1/4+1/4+1/5+1/5+1/6-1/6-1/7+1/7+1/8
=1+1/4+1/4+1/5+1/5+1/8
=2.025
=3901*99*1110/3901/198
=1110*(3901/3901)*(99/198)
=1110*1*1/2
=555
(6)原式=10.375*18.88+18.88*0.625-18.88
=18.88*(10.375+0.625-1)
=18.88*10
=188.8
(8)公式:1/n*(n+1)=1/n-1/(n+1)
所以原式=(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)+(1/10-1/11)
=1-1/11
=10/11
(9)公式:1/n(n+r)=1/r*(1/n-1/n+r)
所以原式=1/(1*3)+1/(3*5)+1/(5*7)+1/(7*9)+1/(9*11)
=1/2(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)
=1/2*(1-1/11)
=1/2*10/11
=5/11
(10)1又1/2=1+1/2
5/6=1/2+1/3
7/12=1/3+1/4
9/20=1/4+1/5
11/30=1/5+1/6
13/42=1/6+1/7
15/56=1/7+1/8
所以原式=(1+1/2)-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)
=1+1/2-1/2-1/3+1/3+1/4+1/4+1/5+1/5+1/6-1/6-1/7+1/7+1/8
=1+1/4+1/4+1/5+1/5+1/8
=2.025
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现在小学生智商真高,都开始做这种题
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