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\(=\dfrac{-3}{7}\left(\dfrac{4}{19}+\dfrac{10}{19}\right)+\dfrac{4}{7}\cdot\dfrac{-14}{19}=\dfrac{14}{19}\left(-\dfrac{3}{7}-\dfrac{4}{7}\right)=-\dfrac{14}{19}\)
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234456
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123798
________
110658
ĐÂY NHÉ !!! ĐÚNG CHO MK LIKE NHEN !!!
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25.6.4.8.125
=(25.4).(125.8).6
=100.1000.6
=100000.6
=600000
\(25\cdot6\cdot4\cdot8\cdot125\)
\(=25\cdot4\cdot6\cdot8\cdot125\)
\(=100\cdot6\cdot1000\)
\(=100000\cdot6\)
\(=600000\)
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a: =-24-73-39+173+139-26
=-50+100+100
=200-50=150
b: =-145-52+45+500-148
=-100+500-200
=200
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c: \(=5+\dfrac{6}{7}-2-\dfrac{3}{8}-1-\dfrac{1}{8}=2+\dfrac{6}{7}-\dfrac{1}{2}=\dfrac{3}{2}+\dfrac{6}{7}=\dfrac{33}{14}\)
e: \(=\dfrac{-3}{5}\left(-\dfrac{1}{9}-\dfrac{5}{6}+\dfrac{5}{2}\right)=\dfrac{-3}{5}\cdot\dfrac{14}{9}=\dfrac{-14}{15}\)
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\(44\cdot102=44\cdot\left(100+2\right)\)
\(=44\cdot100+44\cdot2\)
\(=4400+88\)
\(=4488\)
\(44.102\)
\(=44.\left(100+2\right)\)
\(=44.100+44.2\)
\(=4400+88\)
\(=4488\)