Perhaps because 8 is half of 16, the addition and subtraction facts can only be written one way each.

16 - 8 = 8

8 + 8 = 16

There are more number facts involving 8 and 16. It is helpful to know which of them you are concerned with.

16/8 = 2

16/2 = 8

8*2 = 16

2*8 = 16

16*8 = 128

128/16 = 8

128/8 = 16

16 - 8 = 8

8 + 8 = 16

There are more number facts involving 8 and 16. It is helpful to know which of them you are concerned with.

16/8 = 2

16/2 = 8

8*2 = 16

2*8 = 16

16*8 = 128

128/16 = 8

128/8 = 16