Can you rase one duck or do you half to rase two?

Half of two and one half: one and one fourth 2+1=2+1=4+1=5. 2 1 2 2 2 25/2=5*1=5= 1+1= 1 and a fourth2 2 2 4 41 1/4

2 1/2 - 1 1/2 = 1

1 and 1/4

1 1/2 x 2 2/3 = 4.

Two multiplied by two and one-half = 2 * 2.5 = 5