Question

DEsfaceti parantezele si ofectuati operatile
dau coroana

Answer 1

b) $-(5 \frac{4}{9} -6 \frac{5}{12} )+(-3 \frac{2}{3} - \frac{5}{9} )=$

=$-5 \frac{4}{9} + 6 \frac{5}{12} )-3 \frac{2}{3} - \frac{5}{9} )=$

Putem sa lucram cu intregii separat si fractiile separat:

= -5+6-3-$\frac{4}{9}$+$\frac{5}{12}$-$\frac{2}{3}$-$\frac{5}{9}$=

= -2-1+$\frac{5}{12}$-$\frac{8}{12}$=

= -3-$\frac{1}{4}$=

= - $3 \frac{1}{4}$=

= - $\frac{13}{4}$

d) (1 - $\frac{1}{2}$) - ($\frac{1}{3} - \frac{1}{2}$)-($\frac{1}{4} - \frac{1}{3}$) - ($\frac{1}{5} - \frac{1}{4}$)=

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

=1 - $\frac{1}{5}$=

=$\frac{4}{5}$