Răspuns :
a)[tex] \frac{-2*(-5)*(-9)}{3*6*10} =- \frac{1}{2} [/tex]
b) [tex] \frac{-2*(-5)*(-18)}{19*3*12} =- \frac{5}{19} [/tex]
c)[tex]- \frac{1}{2} + \frac{3}{4} = \frac{-2+3}{4} = \frac{1}{4} [/tex]
d)[tex] \frac{27}{100}*50+ 270: \frac{25}{100}- \frac{42}{99} : \frac{1234-12}{990}= [/tex]
[tex] \frac{27}{2} +270* \frac{100}{25} - \frac{42}{99} * \frac{990}{1222} =[/tex]
[tex] \frac{27}{2} +1080- \frac{210}{611}= [/tex]
[tex] \frac{27*611}{2*611} + \frac{1080*1222}{1222} - \frac{210*2}{611*2} =[/tex]
[tex] \frac{16497+1319760-420}{1222} = \frac{1335837}{1222} [/tex]
b) [tex] \frac{-2*(-5)*(-18)}{19*3*12} =- \frac{5}{19} [/tex]
c)[tex]- \frac{1}{2} + \frac{3}{4} = \frac{-2+3}{4} = \frac{1}{4} [/tex]
d)[tex] \frac{27}{100}*50+ 270: \frac{25}{100}- \frac{42}{99} : \frac{1234-12}{990}= [/tex]
[tex] \frac{27}{2} +270* \frac{100}{25} - \frac{42}{99} * \frac{990}{1222} =[/tex]
[tex] \frac{27}{2} +1080- \frac{210}{611}= [/tex]
[tex] \frac{27*611}{2*611} + \frac{1080*1222}{1222} - \frac{210*2}{611*2} =[/tex]
[tex] \frac{16497+1319760-420}{1222} = \frac{1335837}{1222} [/tex]
