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\(1068\times2006+939\times2006-2007\times1006\)
\(=2006\times\left(1068+939\right)-2007\times1006\)
\(=2006\times2007-2007\times1006\)
\(=2007\times\left(2006-1006\right)\)
\(=2007\times1000\)
\(=2007000\)
\(1068\cdot2006+939\cdot2006-2007\cdot1006\)
\(=2006\cdot\left(1068+939\right)-2007\cdot1006\)
\(=2006\cdot2007-2007\cdot1006\)
\(=2007\cdot\left(2006-1006\right)\)
\(=2007\cdot1000\)
\(=2007000\)
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\(\frac{1}{1\cdot2}+\frac{1}{2\cdot3}+\frac{1}{3\cdot4}+...+\frac{1}{1000\cdot1001}\)
\(=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{1000}-\frac{1}{1001}\)
\(=1-\frac{1}{1001}\)
\(=\frac{1000}{1001}\)
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\(\frac{1000}{3000}-\frac{200}{6000}=\frac{1}{3}-\frac{1}{30}=\frac{10}{30}-\frac{1}{30}=\frac{9}{30}=\frac{1}{10}\)
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Bạn ơi sai đề rồi ở tử phải là 2014x2015+1014
2014x2015+1014/2014x2016-1000
=2014x2015+1014/2014x2015+(2014-1000)
=2014x2015+1014/2014x2015+1014=1
Bạn ơi sai đề rồi ở tử phải là 2014x2015+1014
2014x2015+1014/2014x2016-1000
=2014x2015+1014/2014x2015+(2014-1000)
=2014x2015+1014/2014x2015+1014
=1
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a)\(\frac{16x25+44\text{x}100}{29\text{x}96+142\text{x}48}\)
=\(\frac{4\text{x}4\text{x}25+11\text{x}4\text{x}4\text{x}25}{29\text{x}2\text{x}48+71\text{x}\text{ }2\text{x}48}\)
=\(\frac{\left(1+11\right)x4\text{x}4\text{x}25}{\left(29+71\right)x2\text{x}48}\)
=\(\frac{12\text{x}4\text{x}100}{100\text{x}2\text{x}48}\)
=\(\frac{48\text{x}100}{48\text{x}100\text{x}2}\)
=\(\frac{1}{2}\)
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![](https://rs.olm.vn/images/avt/0.png?1311)
(8x125x10):1000
=( 1000 x 10):1000
= 1000 x 10: 1000
= 1000:1000 x10
= 1 x10
=10
(8x125x10):1000
=(1000x10):1000
=10000:1000
=10
tick mình nha
\(\frac{2004.2006+1000}{2005.2006-1006}\)
\(=\frac{2004.2006+1000}{\left(2004+1\right).2006-1006}\)
\(=\frac{2004.2006+1000}{2004.2006+2006-1006}\)
\(=\frac{2004.2006+1000}{2004.2006+1000}\)
\(=1\)
\(\frac{2004x2006+1000}{2005x2006-1006}\)
=\(\frac{1000}{1x2006-1006}\)cùng giảm 2004 lần số 2006
=\(\frac{1000}{1000}=1\)