Question

Heii cine ma ajuta la tema , repede daca se poate , multumesc <33 >;d< !!!

1. Efectuati:
a) . 1 intreg 5 supra 12 minus deschidem paranteza rotunda '' ( '' 2 intreg 1 supra 48 minus 3 intreg 1 supra 60 inchidem paranteza minus paranteza dreapta '' [ '' 2 intreg 7 supra 18 minus paranteza rotunda 3 intreg 5 supra 48 minus 4 intreg 1 supra 36 inchidem paranteza rotunda si dreapta

Answer 1

$1 \frac{5}{12} -(2 \frac{1}{48} -3 \frac{1}{60}) -[2 \frac{7}{18} -(3 \frac{5}{48} -4\frac{1}{36})]$

$=\frac{17}{12} -( \frac{97}{48} - \frac{91}{60}) -[\frac{43}{18} -( \frac{149}{48} -\frac{145}{36})]$

$=\frac{17}{12} -\frac{5*97-4*91}{240} -(\frac{43}{18} -\frac{149*3-145*4}{144} )$

$=\frac{17}{12} -\frac{485-364}{240} -(\frac{43}{18} -\frac{447-580}{144} )$

$=\frac{17}{12} -\frac{121}{240} -(\frac{43}{18} +\frac{133}{144} )$

$=\frac{17*20-121}{240} -\frac{43*8+133}{144}$

$= \frac{340-121}{240} -\frac{344+133}{144}$

$= \frac{219}{240} -\frac{477}{144}$

$=\frac{219*3-477*5}{720}$

$=\frac{657-2385}{720}$

$=-\frac{1728}{720} = \frac{108}{45} = \frac{12}{5}$