(20052005/20062006-20042004/20052005)×2005×2006
Tính nhanh nha!
Tính nhanh:
A=20052005/20062006-20042004/20052005*2005*2006
= - 4 020 023 < âm nha bn >
~~ tk mk đi ~~
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ai kb vs mk ik ~~ n_n
(20052005/20062006-20042004/20052005)x2005/2006 Giúp mk với nhanh nhé. Cảm ơn rất nhiều !!!
(20052005/20062006-20042004/20052005)x2005/2006
=(2005x10001/2006x10001-2004x10001/2005x10001)x2005/2006
=(2005/2006-2004/2005)x2005/2006
=((2005x2005-2004x2006)/2006x2005)x2005/2006
=((2004x2005+2005-2004x2005+2004)/2005x2006)x2005/2006
=(1/2005x2006)x2005/2006
=2005/2005x2006x2006
=1/2006x2006=1/4024036
chúc bạn học tốt nha :)
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(20052005/20062006-20042004/20052005)x2005x2006
\(\left(\frac{20052005}{20062006}-\frac{20042004}{20052005}\right)\cdot2005\cdot2006\)
=\(\left(\frac{2005\cdot10001}{2006\cdot10001}-\frac{2004\cdot10001}{2005\cdot10001}\right)\cdot2005\cdot2006\)
=\(\frac{2005\cdot2005\cdot2006}{2006}-\frac{2004\cdot2005\cdot2006}{2005}\)
= \(2005\cdot2005-2004\cdot2006\)
=\(2005^2-\left(2005-1\right)\cdot\left(2005+1\right)\)
=\(2005^2-2005^2+1\)
=1
các ban ơi hộ mình 2 câu tính nhanh này nha
\([\frac{20052005}{20062006}-\frac{20042004}{20052005}]x2005x2006\)\(\frac{2013x1999-2013x999}{2004x999+1004}\)\(\left(\frac{20052005}{20062006}-\frac{20042004}{20052005}\right)x2005x2006\)
\(=\left(\frac{2005x10001}{2006x1001}-\frac{2004x10001}{2005x10001}\right)x2005x2006\)
\(=\left(\frac{2005}{2006}-\frac{2004}{2005}\right)x2005x2006\)
\(=\frac{2005x2005x2006}{2006}-\frac{2004x2005x2006}{2005}\)
\(=2005x2005-2004x2006\)
\(=2005x2005-\left(2005-1\right)x2006\)
\(=2005x2005-2005x2006+2006\)
\(=1\)
cảm ơn bạn tíntiếnngân nha nhưng hình nhữ cách làm của bạn bị sai rồi nha
a= 2005*20042004-2004*20052005 tính nhanh
a = 2005 x 2004 x 1001 - 2004 x 2005 x 1001 =0
Tính
2006 x 2006 x 20052005 - 2005 x 2005 x 20062006
__________________________________________
2005 x 20042004
\(\frac{2006\times2006\times20052005-2005\times2005\times20062006}{2005\times20042004}\)
\(=\frac{2006\times2006\times2005\times10001-2005\times2005\times2006\times10001}{2005\times2004\times10001}\)
\(=\frac{2006\times10001\times2005}{2005\times2004\times10001}=\frac{1003}{1002}\)
Tính nhanh: 19001570 x ( 20052005 x 2004 - 20042004 x 2005 )
19001570x(20052005x2004-20042004x2005) =19001570x[(20052005-20042004)x(2005-2004)] =10091570x10001 =...................... k minh nha ban
a) 7/4x(3333/1212+3333/2020+3333/3030+3333/4242) =?
b) (20052005/20062006-20042004/200520050x2005x2006 =?
tính 19001570 . ( 20052005 . 2004 - 20042004 . 2005 )
19001570.(20052005.2004-20042004.2005
= 19001570.(2005.10001.2004-2004.10001.2005)
= 19001570 . 0=0