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\(0,75=\dfrac{75}{100}=\dfrac{75:25}{100:25}=\dfrac{3}{4}\\ 0,8=\dfrac{8}{10}=\dfrac{8:2}{10:2}=\dfrac{4}{5}\\ 2,15=\dfrac{215}{100}=\dfrac{215:5}{100:5}=\dfrac{43}{20}\)
A) \(0,75=\dfrac{75}{100}=\dfrac{75:25}{100:25}=\dfrac{3}{4}\)
B) \(0,8=\dfrac{8}{10}=\dfrac{8:2}{10:2}=\dfrac{4}{5}\)
C) \(2,15=\dfrac{215}{100}=\dfrac{215:5}{100:5}=\dfrac{43}{20}\)
a) 17/40=0,425
321/320=1,003125
1/625=0,0016
1/64=0,015625
b) 1,32=33/25
0,625=5/8
3,129=3129/1000
25,25=101/4
a) 17/40=0,425
321/320=1,003125
1/625=0,0016
1/64=0,015625
b)1,32=132/100=33/25
0,625=625/1000=5/8
3,129=3129/1000
25,25=2525/100=101/4
\(a.\)
\(0.3=\dfrac{3}{10}\)
\(0.72=\dfrac{72}{100}\)
\(1.5=\dfrac{15}{10}\)
\(9.347=\dfrac{9347}{1000}\)
\(b.\)
\(\dfrac{1}{2}=\dfrac{5}{10}\)
\(\dfrac{2}{5}=\dfrac{4}{10}\)
\(\dfrac{3}{4}=\dfrac{75}{100}\)
\(\dfrac{6}{25}=\dfrac{24}{100}\)
a) \(0,3=\dfrac{3}{10}\)
\(0,72=\dfrac{72}{100}\)
\(1,5=\dfrac{15}{10}\)
\(9,347=\dfrac{9347}{1000}\)
b) \(\dfrac{1}{2}=\dfrac{5}{10}\)
\(\dfrac{2}{5}=\dfrac{4}{10}\)
\(\dfrac{3}{4}=\dfrac{75}{100}\)
\(\dfrac{6}{25}=\dfrac{24}{100}\)
\(0,18=18\%\)
\(0,4=40\%\)
\(1,234=123,4\%\)
\(32\%=0,32\)
\(8\%=0,08\)
\(157\%=1,57\)
bài 1
`0,18=0,18xx100=18%`
`0,4=0,4xx100=40%`
bài 2
`32%=32:100=0,32`
`8%=8:100=0,08`
`157%=157:100=1,57`
Ta có : 0,8 = \(\frac{8}{10}=\frac{4}{5}\) 2,15 = \(\frac{215}{100}=\frac{43}{20}\)
0,72 = \(\frac{72}{100}=\frac{18}{25}\) 4,36 = 436/100 = 109/25
a)0,8=4/5
b)0,72=18/25
c)2,15=43/20
d)4,36=109/25