How can i use place value and properties to add and subtract decimals

Place value and decimals are connected. as are the properties of it. Without place value, there would be no decimals. By moving the decimal places up and down the scale, there can be a change in decimals. Adding 10 would move the decimal place 1 spot to the right, while subtracting 10 would move the decimal place 1 space to the left. Hope this helped. :D

Place value by lining the numbers to the place value.