Question

If five slices of pizza cost $5.50, how much do two slices cost? Ten slices? Half a slice ?

Answer 1

1) 5,5:5=1,1$ - cost one slice of this pizza.
2) 1,1*2=2,2$ - cost two slices.
3) 1,1*10=11$ - cost ten slices.
4) 1,1:2=0,55$ - cost half a slice.