Identify the property of addition used. Write your answer in your notebook. Kindly take a photo of your answer and upload it here.​​​

______________________1. 70 + 30 = 30 + 70

______________________2. 0 + 897 = 897

______________________3. (12 + 4) + 5 = 12 + (4 + 5)

______________________4. 985 985 + 0 = 985 985

______________________5. 4 + 16 + 25 = 16 + 25 + 4

Arrange the following in columns then find the sum and difference. Write your answer in your notebook. Kindly take a photo of your answer and upload it here.​​​

6. 280 - 140 =

7. 42 + 46 =

8. 531 + 325 =

9. 187 - 94 =

10. 223 - 163 =