Addition and Subtraction Properties


Something about Addition


Commutative Property

The first thing you should know about Addition is that the order of adding is not important.

They even have a complicated name for it: Commutative Property.
Here, look at this:


Commutative Property

You see? When we add the numbers - we get the same result on both sides:





Associative Property

The same goes for 3 or more numbers. You can add in any order you like - you'll get the same result.

This one is called (don't try to remember it): Associative Property.
Here, we start the same on both sides:


Associative Property

but group (add) numbers differently:



and at the end - we get the same result:





Adding a zero

Finally, adding a zero - is actually adding noting - or more accurately not adding anything:







Something about Subtraction


OK, let's see what applies to Subtraction.
Here, check this out:


Subtraction - Addition connection



Then see this:



Do you see? This is why:



And that is the conneciton between Addition and Subtraction.




Subtracting a zero

And of course, subtracting a zero from a number makes no difference also:



If we take away zero = nothing, then we did not take anything. :-)







Return from Addition and Subtraction Properties to First Grade Math Addition Worksheets

Return from Addition and Subtraction Properties to First Grade Math Subtraction Worksheets

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