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= ( 125 : 10 ) x ( 20,14 x 10) - 2,5 x 201,4
= 12,5 x 201,4 - 2,5 x 201,4
= ( 12,5 - 2,5 ) x 201,4
= 10 x 201,4
= 2014
k cho mình nhé
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Ta thấy: \(3=3\times\frac{625}{625}=625\times\frac{3}{625}\)
\(\frac{3}{5}=\frac{3}{5}\times\frac{125}{125}=\frac{3\times125}{625}=125\times\frac{3}{625}\)
\(\frac{3}{25}=\frac{3}{25}\times\frac{25}{25}=\frac{3\times25}{625}=25\times\frac{3}{625}\)
\(\frac{3}{125}=\frac{3}{125}\times\frac{5}{5}=\frac{3\times5}{625}=5\times\frac{3}{625}\)
Từ đó, suy ra : \(3+\frac{3}{5}+\frac{3}{25}+\frac{3}{125}+\frac{3}{625}\)
\(=625\times\frac{3}{625}+125\times\frac{3}{625}+25\times\frac{3}{625}+5\times\frac{3}{625}+\frac{3}{625}\)
\(=\frac{3}{625}\left(625+125+25+5+1\right)\)
\(=\frac{3}{625}\times781\)
\(=\frac{2343}{625}\)
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= 1/2 : 1/2 - 1/4 : 1/4 + 1/8 : 1/8 : 1/10
= 1 - 1 + 1 : 0,1
= 0 + 10
= 10
k mk nha !
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\(AB=\sqrt{6^2+8^2}=10\left(cm\right)\)
BD là phân giác
=>CD/BC=DA/BA
=>CD/4=DA/5=6/9=2/3
=>CD=8/3cm; DA=10/3cm
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7 . (-2)^3 - 60:15
= 7 . (-8) - 4
= (-56)- 4
= - 60
125 - (-75) + 32 - (48 + 32)
= 125-75 + 32 - 48 -32
= 50 + (-48)
=2
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a)(-4).(-3).(-125).25.(-8)
=[(-4).25].[(-125).(-8)].3
=(-100).1000.3
=-100000.3
=-300000
b)(-4).9.(-125).25.(-8)
=[(-4).25].[(-8).(-125)].9
=(-100).1000.9
=-100000.9
=-900000