Question

Am nevoie de putin ajutor!

Answer 1

1-1/2=2/2-1/2=1/2

1+0,5=1,50=3/2

1/2×3/2=3/4

Answer 2

$\it \left(1-\dfrac{1}{2}\right)(1+0,5) =\left(1-\dfrac{1}{2}\right) \left(1+\dfrac{1}{2}\right)= 1^2-\left(\dfrac{1}{2}\right)^2=1-\dfrac{1}{4}=\dfrac{3}{4}$