If five slices of pizza cost $5.50 how much did two slices cost 10 slices have a slice

Five slices of pizza = 5.50, so 5.50:5 = $1.10 is how much one slice of pizza cost

1.10*2 = $2.20 for 2 slices of pizza

1.10*10 = $11.00 for 10 slices of pizza

1.10:2 = $0.55 for half a slice of pizza