Question

calculeaza 1supra2minus2supra3plu​

Answer 1

(1/2-2/3+3/4):14/12=

=(6/12-8/12+9/12):7/6=

=(-2/12+9/12):7/6=

=7/12:7/6=

=7/12×6/7=1/2

Answer 2

(1supra2-2supra3+3supra4):14supra12=

$\it \Big(\dfrac{^{6)}1}{\ 2}-\dfrac{^{4)}2}{\ 3}+\dfrac{^{3)}3}{\ 4}\Big):\dfrac{14}{12}=\dfrac{6-8+9}{12}:\dfrac{14}{12}=\dfrac{7}{12}\cdot\dfrac{12}{14}=\dfrac{\ 7^{(7}}{14}=\dfrac{1}{2}$