Question

calculati [1 pe 2 impartit 1 pe 4 - 2,(3) inmultit 5 pe 7] impartit 0,(6)

Answer 1

[1/2 : 1/4 - 2,(3)× 5/7] : 0,(6)=
=[1/2 × 4 - (23-2)/9 × 5/7] : 6/9=
=(2- 21/9 × 5/7) : 2/3=
=(2- 7/3 × 5/7) × 3/2=
=(2- 5/3) × 3/2=
=(6- 5)/3 × 3/2=
=1/3× 3/2=
=1/2