Number Bonds

As we work on addition and subtraction in Kindergarten, we work extensively with a mathematics chart called a "number bond".  Here is a number bond:

Each circle of the number bond has a name to describe its role in a bond:

The whole is the total amount and it is connected to each part- so two lines connect to the whole.

The parts are the two numbers that, when put together, equal the whole amount.

Notice that there is not a line connecting  part to part.

Here is a functioning number bond:

Here you can see that if you take the two parts (2 and 3) and put them together, it makes the whole (5) amount.

To begin, we might say 3 and 2 make 5.  Then, it leads us into 3 + 2 = 5.

The same applies to subtraction, except we cross off the number that is being taken away:

Here you can see that if you take the whole (5) and take away the part that is crossed out (3), the remaining part would be 2.

Eventually this leads us to writing 5 - 3 = 2

We use number bonds daily and you will start to see them coming home on homework.

Please let me know if you have any questions.