tinh hop li 51.39
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\(2002.2022+2000+22-2022.1003\)
\(=2002.2022+2022.1-2022.1003\)
\(=2022.\left(2002+1-1003\right)\)
\(=2022.1000\)
\(=2022000\)
2002.2022+2000+22-2022.1003
=2002.2022-2022.1003+2000+22
=2002.2022-2022.1003+2022
=2022.(2002-1003+1)
=2022.1000
=2022000
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192:16=12:1(chia cả 2 số cho 16 nhưng thưong vẫn ko đổi)=12
k nhé
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\(\dfrac{1}{4}-\dfrac{1}{3}+\dfrac{5}{12}\\ =\dfrac{3}{12}-\dfrac{4}{12}+\dfrac{5}{12}\\ =\dfrac{3-4+5}{12}\\ =\dfrac{4}{12}\\ =\dfrac{1}{3}\)
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\(B=\frac{1.3.5....2011.2013}{1008.1009....2013.2014}\)
\(\Rightarrow B=\frac{1.3.5...1007.1009...2013}{1008.1009...2013.2014}\)
\(\Rightarrow B=\frac{1.3.5...1006}{1008.1010...2014}\)
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1234.2014+2014.8766
=2014.(1234+8766)=2014.10000=20140000
\(1234.2014+2014.8766\)
\(=2014.\left(1234+8766\right)\)
\(=2014.10000\)
\(=20140000\)
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\(-23.63+23.21-58.23\)
\(=-23.\left(63+21-58\right)\)
\(=-23.26\)
\(=-598\)
k mik nha