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\(A=\frac{17}{19}x\frac{1}{6}+\frac{17}{19}x\frac{5}{6}\)
\(=\frac{17}{19}x\left(\frac{1}{6}+\frac{5}{6}\right)=\frac{17}{19}x1=\frac{17}{19}\)
A= \(\frac{1717}{1919}\text{ *}\frac{303}{1818}+\frac{17}{19}\text{ *}\frac{1515}{1818}\)
A= \(\frac{17}{19}\text{ *}\frac{3}{18}+\frac{17}{19}\text{ *}\frac{15}{18}\)
A= \(\frac{17}{19}\text{ *}\left(\frac{3}{18}+\frac{15}{18}\right)\)
A= \(\frac{17}{19}\text{ *}1\)
A= \(\frac{17}{19}\)
Vậy A= \(\frac{17}{19}\)
vVv Học tốt nhé bạn, mình sẽ rất vui nếu bạn k đúng cho mình, cảm ơn ban nhiều vVv
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18/15*35/36+18/15*15/18-18/15*20/72
5/6+1/1-1/3
5/6+6/6-2/6
3/2
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(2525/3737-171717/191919+19/21) x (1/6+1/4-5/12)
=(25/37-17/19+19/21) x 0
=0
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y/4x9/2x4/5=160/3
y/4x18/5=160/3
y/4 =160/3:18/5
y/4 =400/27
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( 107 + 93 ) : 2 x 5 : 2
= 200 : 2 x 5 : 2
= 100 x 5 : 2
= 500 : 2
= 250
Vậy giá trị biểu thức trên là 250
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\(\frac{1515}{2525}=\frac{15x101}{25x101}=\frac{3}{5}\)
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Câu 1 Sai đề nếu đúng thì X là 6
1+3+6=10
2500:10 =250
h dung la 250*160=34000
`1515/2525 - 2/5 xx x = 1919/3838`
`15/25 - 2/5 xx x = 19/38`
`3/5 - 2/5 xx x = 1/2`
`2/5 xx x = 3/5 - 1/2`
`2/5 xx x = 6/10 -5/10`
`2/5 xx x =1/10`
`x=1/10 :2/5`
`x=1/10 xx 5/2`
`x=1/4`
1515/2525 - 2/5 x x = 1919/3838
= 3/5 - 2/5 x X = 1/2
= 2/5 x X = 3/5 - 1/2
= 2/5 x X = 1/10
= X = 1/10 : 2/5
= X =1/4