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VladutX
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DEsfaceti parantezele si ofectuati operatile
dau coroana


DEsfaceti Parantezele Si Ofectuati Operatiledau Coroana class=

Răspuns :

b) [tex]-(5 \frac{4}{9} -6 \frac{5}{12} )+(-3 \frac{2}{3} - \frac{5}{9} )=[/tex]

=[tex]-5 \frac{4}{9} + 6 \frac{5}{12} )-3 \frac{2}{3} - \frac{5}{9} )=[/tex]

Putem sa lucram cu intregii separat si fractiile separat:

= -5+6-3-[tex] \frac{4}{9} [/tex]+[tex] \frac{5}{12} [/tex]-[tex] \frac{2}{3} [/tex]-[tex] \frac{5}{9} [/tex]=

= -2-1+[tex] \frac{5}{12} [/tex]-[tex] \frac{8}{12} [/tex]=

= -3-[tex] \frac{1}{4} [/tex]=

= - [tex]3 \frac{1}{4} [/tex]=

= - [tex] \frac{13}{4} [/tex]

d) (1 - [tex] \frac{1}{2} [/tex]) - ([tex] \frac{1}{3} - \frac{1}{2} [/tex])-([tex] \frac{1}{4} - \frac{1}{3} [/tex]) - ([tex] \frac{1}{5} - \frac{1}{4} [/tex])=

=1-[tex] \frac{1}{2} [/tex]-[tex] \frac{1}{3} + \frac{1}{2} [/tex]-[tex] \frac{1}{4} + \frac{1}{3} [/tex]-[tex] \frac{1}{5} + \frac{1}{4} [/tex]=

=1 - [tex] \frac{1}{5} [/tex]=

=[tex] \frac{4}{5} [/tex]