Property of Addition

_____ 1. 6 + _ = 4 + 6

_____ 2. (4 + 8) + 2 = 4 + ( _ + 2)

_____ 3. 8 + _ = 8

_____4. _ + 25 = 25

_____ 5. _ + 9 = 9 + 8

_____ 6. 9 + (1 + 5) = (9 + _ ) + 5

_____ 7. (3 + 7) + 5 = 3 +(7 + _ )

_____ 8. 6 + = 5 + 6

_____ 9. _+ 12 = 12

_____10. 15 + _ = 8 + 15