1.Transformati in fractii zecimale urmatoarele numere: 17 supra 20 ,
1.Transformati in fractii zecimale urmatoarele numere: 17 supra 20 , 19 supra 17, 23 supra 6.
2. Transformati in fractii ordinare ireductibile 2,42 , -5,(27) , 3,56(2)
3.Pentru fiecare dintre numerele urmatoare aflati modulul si opusul sau:
2 supra 3 , -15 supra 11 , 4,75 , -3,8 , 0 , -7 , 5supra 9

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Răspunsuri

2014-09-11T17:03:31+03:00
 \frac{17}{20} =0,85
 \frac{19}{17} =1,11764
 \frac{23}{6} =3,8(3)
2.
2,42= \frac{242}{100} = \frac{121}{50}
 -5\frac{27}{99}= -5 \frac{3}{11} = -\frac{58}{11}
3 \frac{562-56}{900} =3 \frac{506}{900} =3 \frac{253}{450} = \frac{1603}{450}
3.
| \frac{2}{3} |= \frac{2}{3}; opusul  -\frac{2}{3}
| \frac{-15}{11} |= \frac{15}{11} ; opusul  \frac{15}{11}
|4,75|=4,75; opusul -4,75
|-3,8|=3,8; opusul 3,8
|- \frac{7,5}{9} )=|- \frac{ \frac{75}{10} }{9}|=\frac{5}{6} };    opusul este  \frac{5}{6}
2 4 2