六年级简便运算
17/9÷[(4/9+1/2)×9/17]=1又2/3×1又2/5×1又2/7×1又2/9×1又2/11×…×1又2/199=(1+1/3+1/5+1/10+1/15+1...
17/9÷[(4/9+1/2)×9/17]
=
1又2/3×1又2/5×1又2/7×1又2/9×1又2/11×…×1又2/199
=
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
=
[17.1-17.2÷(3.1-0.7)]×0.6
=
(2又2/9×4/5+2又2/9×6.2-5.8×2又2/9-1/5÷9/20)×9/20
=
2009÷2009又2009/2010+1/2011
=
要过程!多谢了! 展开
=
1又2/3×1又2/5×1又2/7×1又2/9×1又2/11×…×1又2/199
=
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
=
[17.1-17.2÷(3.1-0.7)]×0.6
=
(2又2/9×4/5+2又2/9×6.2-5.8×2又2/9-1/5÷9/20)×9/20
=
2009÷2009又2009/2010+1/2011
=
要过程!多谢了! 展开
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17/9÷[(4/9+1/2)×9/17]
=17/9÷(17/18*9/17)
=(17/9)*2
=34/9
1又2/3×1又2/5×1又2/7×1又2/9×1又2/11×…×1又2/199
=5/3*7/5*9/7*..........................199/197*201/199
=201/3
=67
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
=[(30+10+6+3+2+1)/30]÷[(30+15+10+5+3+1)/60]
=(52/30)*(60/64)
=13/8
[17.1-17.2÷(3.1-0.7)]×0.6
=(17.1-17.2÷2.4)*0.6
=17.1*0.6-17.2/2.4*0.6
=10.26-4.3
=5.94
(2又2/9×4/5+2又2/9×6.2-5.8×2又2/9-1/5÷9/20)×9/20
=20/9*(0.8+6.2-5.8-0.2)*9/20
=0.8+6.2-5.8-0.2
=7-6
=1
2009÷2009又2009/2010+1/2011
=2009÷[2009*(1+1/2010)]+1/2011
=1÷(2011/2010)+1/2011
=2010/2011+1/2011
=1
=17/9÷(17/18*9/17)
=(17/9)*2
=34/9
1又2/3×1又2/5×1又2/7×1又2/9×1又2/11×…×1又2/199
=5/3*7/5*9/7*..........................199/197*201/199
=201/3
=67
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
=[(30+10+6+3+2+1)/30]÷[(30+15+10+5+3+1)/60]
=(52/30)*(60/64)
=13/8
[17.1-17.2÷(3.1-0.7)]×0.6
=(17.1-17.2÷2.4)*0.6
=17.1*0.6-17.2/2.4*0.6
=10.26-4.3
=5.94
(2又2/9×4/5+2又2/9×6.2-5.8×2又2/9-1/5÷9/20)×9/20
=20/9*(0.8+6.2-5.8-0.2)*9/20
=0.8+6.2-5.8-0.2
=7-6
=1
2009÷2009又2009/2010+1/2011
=2009÷[2009*(1+1/2010)]+1/2011
=1÷(2011/2010)+1/2011
=2010/2011+1/2011
=1
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解:17/9÷[(4/9+1/2)×9/17]
=17/9÷[(4+9/2)/17]=17/9÷[(17/2)/17]=17/9×2=34/9;
1又2/3×1又2/5×1又2/7×1又2/9×1又2/11×…×1又2/199
=5/3×7/5×9/7×11/9×13/11×…×201/199=201/3=67;
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
=(30+10+6+3+2+1)/30÷[(30+15+10+5+3+1)/60]=52/30÷(64/60)=104/64=13/8;
[17.1-17.2÷(3.1-0.7)]×0.6
=[17.1-17.2÷2.4]×0.6=10.26-4.3=5.96;
(2又2/9×4/5+2又2/9×6.2-5.8×2又2/9-1/5÷9/20)×9/20
=(20/9×4/5+20/9×6.2-5.8×20/9-1/5÷9/20)×9/20=(0.8+6.2-5.8-0.2/81)=1.2-0.2/81=485/405;
2009÷2009又2009/2010+1/2011
=2009÷(2009+2009/2010)+1/2011=2009×2010/(2009×2011)+1/2011=2010/2011+1/2011=1。
=17/9÷[(4+9/2)/17]=17/9÷[(17/2)/17]=17/9×2=34/9;
1又2/3×1又2/5×1又2/7×1又2/9×1又2/11×…×1又2/199
=5/3×7/5×9/7×11/9×13/11×…×201/199=201/3=67;
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
=(30+10+6+3+2+1)/30÷[(30+15+10+5+3+1)/60]=52/30÷(64/60)=104/64=13/8;
[17.1-17.2÷(3.1-0.7)]×0.6
=[17.1-17.2÷2.4]×0.6=10.26-4.3=5.96;
(2又2/9×4/5+2又2/9×6.2-5.8×2又2/9-1/5÷9/20)×9/20
=(20/9×4/5+20/9×6.2-5.8×20/9-1/5÷9/20)×9/20=(0.8+6.2-5.8-0.2/81)=1.2-0.2/81=485/405;
2009÷2009又2009/2010+1/2011
=2009÷(2009+2009/2010)+1/2011=2009×2010/(2009×2011)+1/2011=2010/2011+1/2011=1。
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17/9÷[(4/9+1/2)×9/17]=17/9×9/17÷(4/9+1/2)=1÷(17/18)=18/17
1又2/3×1又2/5×1又2/7×1又2/9×1又2/11×…×1又2/199
=(5/3)(7/5)(9/7)(11/9)(13/11).......(201/199)=201/3=67
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
=(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)*(60/60)=(60+20+12+6+4+2)/(30+15+10+5+3+1)=13/8
[17.1-17.2÷(3.1-0.7)]×0.6
=[171/10-(172/10)(10/24)]*0.6=(171*6/100)-43/10=596/100=5.96
(2又2/9×4/5+2又2/9×6.2-5.8×2又2/9-1/5÷9/20)×9/20
=20/9(0.8+6.2-5.8-0.2)*(9/20)=1
2009÷2009又2009/2010+1/2011=2009÷【(2009*2010+2009)/2010)】+1/2011=2010/2011+1/2011=1
1又2/3×1又2/5×1又2/7×1又2/9×1又2/11×…×1又2/199
=(5/3)(7/5)(9/7)(11/9)(13/11).......(201/199)=201/3=67
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
=(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)*(60/60)=(60+20+12+6+4+2)/(30+15+10+5+3+1)=13/8
[17.1-17.2÷(3.1-0.7)]×0.6
=[171/10-(172/10)(10/24)]*0.6=(171*6/100)-43/10=596/100=5.96
(2又2/9×4/5+2又2/9×6.2-5.8×2又2/9-1/5÷9/20)×9/20
=20/9(0.8+6.2-5.8-0.2)*(9/20)=1
2009÷2009又2009/2010+1/2011=2009÷【(2009*2010+2009)/2010)】+1/2011=2010/2011+1/2011=1
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题目不难,很想回答你,但看到“要过程”3个字,我退却了...
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